update

11 files changed, 865 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..259148f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,32 @@
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
diff --git a/1337/header.hpp b/1337/header.hpp
new file mode 100644
index 0000000..2df2a5a
--- /dev/null
+++ b/1337/header.hpp
@@ -0,0 +1,4 @@
+
+#include <iostream>
+#include <string>
+#include <vector>
diff --git a/1337/main.cpp b/1337/main.cpp
new file mode 100644
index 0000000..1e3ab45
--- /dev/null
+++ b/1337/main.cpp
@@ -0,0 +1,56 @@
+#include "header.hpp"
+
+class Solution {
+public:
+  std::vector<int> kWeakestRows(std::vector<std::vector<int>> &mat, int k) {
+    std::pair<std::vector<int>, std::vector<int>> sums;
+    sums.first.reserve(mat.size());
+    sums.second.reserve(mat.size());
+    int row = 0;
+    int sum = 0;
+
+    for (auto &iter : mat) {
+      for (auto &ya_iter : iter) {
+        sum += ya_iter;
+        if (0 == ya_iter) {
+          break;
+        }
+      }
+      sums.first[row] = row;
+      sums.second[row] = sum;
+      row++;
+      sum = 0;
+    }
+
+    for (int i = 0; i < row - 1; ++i) {
+      for (int j = 0; j < row - 1; ++j) {
+        if (sums.second[j] > sums.second[j + 1]) {
+          std::swap(sums.first[j], sums.first[j + 1]);
+          std::swap(sums.second[j], sums.second[j + 1]);
+        }
+      }
+    }
+
+    /* for (int i = 0; i < row; ++i) { */
+    /*   std::cout << sums.first[i] << ":" << sums.second[i] << "\n"; */
+    /* } */
+
+    std::vector<int> result(k);
+    std::copy(sums.first.begin(), sums.first.begin() + k, result.begin());
+    return result;
+  }
+};
+
+int main(int argc, char **argv) {
+  Solution solution;
+  std::vector<std::vector<int>> mat = {{1, 1, 0, 0, 0},
+                                       {1, 1, 1, 1, 0},
+                                       {1, 0, 0, 0, 0},
+                                       {1, 1, 0, 0, 0},
+                                       {1, 1, 1, 1, 1}};
+  auto result = solution.kWeakestRows(mat, 3);
+  for (int i = 0; i < 3; ++i) {
+    std::cout << result[i] << "\n";
+  }
+  return 0;
+}
diff --git a/1337/makefile b/1337/makefile
new file mode 100644
index 0000000..d5e9dc0
--- /dev/null
+++ b/1337/makefile
@@ -0,0 +1,238 @@
+TARGET?=main
+SHELL=bash
+SHELL?=bash
+CXX=clang++
+CXX?=clang++
+ifdef OS
+CXX_FLAGS=-std=c++20
+else
+CXX_FLAGS=-std=c++20 -fpic
+endif
+CXX_EXTRA?=
+CTAGS_I_PATH?=./
+LD_FLAGS= -include-pch header.hpp.gch
+EXTRA_LD_FLAGS?=
+ADD_SANITIZERS_CC= -g -fsanitize=address -fno-omit-frame-pointer
+ADD_SANITIZERS_LD= -g -fsanitize=address
+MEM_SANITIZERS_CC= -g -fsanitize=memory -fno-omit-frame-pointer
+MEM_SANITIZERS_LD= -g -fsanitize=memory
+UB_SANITIZERS_CC= -g -fsanitize=undefined -fno-omit-frame-pointer
+UB_SANITIZERS_LD= -g -fsanitize=undefined
+FUZZ_SANITIZERS_CC= -fsanitize=fuzzer,address -g -fno-omit-frame-pointer
+FUZZ_SANITIZERS_LD= -fsanitize=fuzzer,address -g -fno-omit-frame-pointer
+COV_CXX= -fprofile-instr-generate -fcoverage-mapping
+COV_LD= -fprofile-instr-generate
+# BUILD_MODES are=RELEASE(default), DEBUG,ADDSAN,MEMSAN,UBSAN,FUZZ
+BUILD_MODE?=RELEASE
+#EXCLUSION_LIST='(\bdip)|(\bdim)'
+EXCLUSION_LIST='xxxxxx'
+OBJ_LIST:=$(patsubst %.cpp, %.o, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+OBJ_COV_LIST:=$(patsubst %.cpp, %.ocov, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+OBJ_DBG_LIST:=$(patsubst %.cpp, %.odbg, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+ASM_LIST:=$(patsubst %.cpp, %.s, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+WASM_LIST:=$(patsubst %.cpp, %.wasm, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+WAST_LIST:=$(patsubst %.cpp, %.wast, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+IR_LIST:=$(patsubst %.cpp, %.ir, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+JS_LIST:=$(patsubst %.cpp, %.js, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+AST_LIST:=$(patsubst %.cpp, %.ast, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+
+ifeq ($(BUILD_MODE), ADDSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(ADD_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(ADD_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), MEMSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(MEM_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(MEM_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), UBSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(UB_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(UB_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), FUZZ)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(FUZZ_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(FUZZ_SANITIZERS_LD)
+endif
+
+SRCS:=$(wildcard *.cpp)
+HDRS:=$(wildcard *.h)
+CXX_FLAGS+=$(CXX_EXTRA)
+LD_FLAGS+=$(EXTRA_LD_FLAGS)
+
+.DEFAULT:all
+
+.PHONY:all clean help ASM SO TAGS WASM JS exe IR WAST A ADBG AST cppcheck DOCKER
+
+all:exe
+
+everything:$(TARGET) A ASM SO $(TARGET)-static $(TARGET)-dbg ADBG TAGS $(TARGET)-cov WASM JS IR WAST AST DOCKER
+
+depend:.depend
+
+.depend:$(SRCS)
+	rm -rf .depend
+	$(CXX) -MM $(CXX_FLAGS) $^ > ./.depend
+	echo $(patsubst %.o:, %.odbg:, $(shell $(CXX) -MM $(CXX_FLAGS) $^)) | sed -r 's/[A-Za-z0-9\-\_]+\.odbg/\n&/g' >> ./.depend
+	echo $(patsubst %.o:, %.ocov:, $(shell $(CXX) -MM $(CXX_FLAGS) $^)) | sed -r 's/[A-Za-z0-9\-\_]+\.ocov/\n&/g' >> ./.depend
+
+-include ./.depend
+
+.cpp.o: header.hpp.gch
+	$(CXX) $(CXX_FLAGS) -c $< -o $@
+
+%.odbg:%.cpp
+	$(CXX) $(CXX_FLAGS) -g -c $< -o $@
+
+%.ocov:%.cpp
+	$(CXX) $(CXX_FLAGS) $(COV_CXX) -c $< -o $@
+
+header.hpp.gch:header.hpp
+	$(CXX) $(CXX_FLAGS) -c $< -o $@
+
+exe: header.hpp.gch $(TARGET)
+
+$(TARGET): $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -o $@
+
+$(TARGET)-static: $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -static -o $@
+
+$(TARGET)-dbg: $(OBJ_DBG_LIST)
+	$(CXX) $(LD_FLAGS) $^ -g -o $@
+
+$(TARGET)-cov: $(OBJ_COV_LIST)
+	$(CXX) $(LD_FLAGS) $^ $(COV_LD) -o $@
+
+cov: runcov
+	@llvm-profdata merge -sparse ./default.profraw -o ./default.profdata
+	@llvm-cov show $(TARGET)-cov -instr-profile=default.profdata
+
+covrep: runcov
+	@llvm-profdata merge -sparse ./default.profraw -o ./default.profdata
+	@llvm-cov report $(TARGET)-cov -instr-profile=default.profdata
+
+ASM:$(ASM_LIST)
+
+SO:$(TARGET).so
+
+A:$(TARGET).a
+
+ADBG:$(TARGET).adbg
+
+IR:$(IR_LIST)
+
+WASM:$(WASM_LIST)
+
+WAST:$(WAST_LIST)
+
+JS:$(JS_LIST)
+
+AST:$(AST_LIST)
+
+TAGS:tags
+
+#https://github.com/rizsotto/Bear
+BEAR: clean
+	bear make
+
+tags:$(SRCS)
+	$(shell $(CXX) -c -I $(CTAGS_I_PATH) -M $(SRCS)|\
+		sed -e 's/[\\ ]/\n/g'|sed -e '/^$$/d' -e '/\.o:[ \t]*$$/d'|\
+		ctags -L - --c++-kinds=+p --fields=+iaS --extra=+q)
+
+%.s: %.cpp
+	$(CXX) -S $< -o $@
+	# objdump -r -d -M intel -S $< > $@
+
+%.ir: %.cpp
+	$(CXX) -emit-llvm -S -o $@ $<
+
+%.wasm: %.cpp
+	em++ $< -o $@
+
+%.wast: %.wasm
+	wasm2wat $< > $@
+
+%.js: %.cpp
+	em++ $< -s FORCE_FILESYSTEM=1 -s EXIT_RUNTIME=1 -o $@
+
+%.ast: %.cpp
+	$(CXX) -Xclang -ast-dump -fsyntax-only $< > $@
+
+$(TARGET).so: $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -shared -o $@
+
+$(TARGET).a: $(OBJ_LIST)
+	ar rcs $(TARGET).a $(OBJ_LIST)
+
+$(TARGET).adbg: $(OBJ_DBG_LIST)
+	ar rcs $(TARGET).adbg $(OBJ_DBG_LIST)
+
+runcov: $(TARGET)-cov
+	$(TARGET)-cov
+
+test: $(TARGET)
+	$(TARGET)
+
+run: $(TARGET)
+	"./$(TARGET)"
+
+valgrind: $(TARGET)
+	- valgrind --track-origins=yes --leak-check=full --show-leak-kinds=all $(TARGET)
+
+cppcheck:
+	cppcheck $(SRCS)
+
+rundbg: $(TARGET)-dbg
+	gdb --batch --command=./debug.dbg --args $(TARGET)-dbg
+
+format:
+	- clang-format -i $(SRCS) $(HDRS)
+
+DOCKER: Dockerfile
+	docker buld -t proto ./
+
+clean:
+	- rm -f *.o *.dis *.odbg *.ocov *.js *.ir *~ $(TARGET) $(TARGET).so $(TARGET)-static \
+		$(TARGET)-dbg $(TARGET).a $(TARGET)-cov *.wasm *.wast $(TARGET).adbg *.ast
+
+deepclean: clean
+	- rm tags
+	- rm .depend
+	- rm ./default.profraw ./default.profdata
+	- rm vgcore.*
+	- rm compile_commands.json
+	- rm *.gch
+
+help:
+	@echo "--all is the default target, runs $(TARGET) target"
+	@echo "--everything will build everything"
+	@echo "--SO will generate the so"
+	@echo "--ASM will generate assembly files"
+	@echo "--TAGS will generate tags file"
+	@echo "--BEAR will generate a compilation database"
+	@echo "--IR will generate llvm IR"
+	@echo "--$(TARGET) builds the dynamically-linked executable"
+	@echo "--$(TARGET)-dbg will generate the debug build. BUILD_MODE should be set to DEBUG to work"
+	@echo "--$(TARGET)-static will statically link the executable to the libraries"
+	@echo "--$(TARGET)-cov is the coverage build"
+	@echo "--cov will print the coverage report"
+	@echo "--covrep will print the line coverage report"
+	@echo "--A will build the static library"
+	@echo "--TAGS will build the tags file"
+	@echo "--clean"
+	@echo "--deepclean will clean almost everything"
diff --git a/1342/header.hpp b/1342/header.hpp
new file mode 100644
index 0000000..2df2a5a
--- /dev/null
+++ b/1342/header.hpp
@@ -0,0 +1,4 @@
+
+#include <iostream>
+#include <string>
+#include <vector>
diff --git a/1342/main.cpp b/1342/main.cpp
new file mode 100644
index 0000000..b8609d9
--- /dev/null
+++ b/1342/main.cpp
@@ -0,0 +1,21 @@
+
+#include "header.hpp"
+
+class Solution {
+public:
+  static int numberOfSteps(int num) {
+    auto dummy = num;
+    int counter = 0;
+    while (dummy != 0) {
+      if (dummy % 2 == 0) {
+        dummy = dummy >> 1;
+      } else {
+        dummy--;
+      }
+      counter++;
+    }
+    return counter;
+  }
+};
+
+int main(int argc, char **argv) { std::cout << Solution::numberOfSteps(123); }
diff --git a/1342/makefile b/1342/makefile
new file mode 100644
index 0000000..d5e9dc0
--- /dev/null
+++ b/1342/makefile
@@ -0,0 +1,238 @@
+TARGET?=main
+SHELL=bash
+SHELL?=bash
+CXX=clang++
+CXX?=clang++
+ifdef OS
+CXX_FLAGS=-std=c++20
+else
+CXX_FLAGS=-std=c++20 -fpic
+endif
+CXX_EXTRA?=
+CTAGS_I_PATH?=./
+LD_FLAGS= -include-pch header.hpp.gch
+EXTRA_LD_FLAGS?=
+ADD_SANITIZERS_CC= -g -fsanitize=address -fno-omit-frame-pointer
+ADD_SANITIZERS_LD= -g -fsanitize=address
+MEM_SANITIZERS_CC= -g -fsanitize=memory -fno-omit-frame-pointer
+MEM_SANITIZERS_LD= -g -fsanitize=memory
+UB_SANITIZERS_CC= -g -fsanitize=undefined -fno-omit-frame-pointer
+UB_SANITIZERS_LD= -g -fsanitize=undefined
+FUZZ_SANITIZERS_CC= -fsanitize=fuzzer,address -g -fno-omit-frame-pointer
+FUZZ_SANITIZERS_LD= -fsanitize=fuzzer,address -g -fno-omit-frame-pointer
+COV_CXX= -fprofile-instr-generate -fcoverage-mapping
+COV_LD= -fprofile-instr-generate
+# BUILD_MODES are=RELEASE(default), DEBUG,ADDSAN,MEMSAN,UBSAN,FUZZ
+BUILD_MODE?=RELEASE
+#EXCLUSION_LIST='(\bdip)|(\bdim)'
+EXCLUSION_LIST='xxxxxx'
+OBJ_LIST:=$(patsubst %.cpp, %.o, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+OBJ_COV_LIST:=$(patsubst %.cpp, %.ocov, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+OBJ_DBG_LIST:=$(patsubst %.cpp, %.odbg, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+ASM_LIST:=$(patsubst %.cpp, %.s, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+WASM_LIST:=$(patsubst %.cpp, %.wasm, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+WAST_LIST:=$(patsubst %.cpp, %.wast, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+IR_LIST:=$(patsubst %.cpp, %.ir, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+JS_LIST:=$(patsubst %.cpp, %.js, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+AST_LIST:=$(patsubst %.cpp, %.ast, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+
+ifeq ($(BUILD_MODE), ADDSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(ADD_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(ADD_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), MEMSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(MEM_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(MEM_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), UBSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(UB_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(UB_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), FUZZ)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(FUZZ_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(FUZZ_SANITIZERS_LD)
+endif
+
+SRCS:=$(wildcard *.cpp)
+HDRS:=$(wildcard *.h)
+CXX_FLAGS+=$(CXX_EXTRA)
+LD_FLAGS+=$(EXTRA_LD_FLAGS)
+
+.DEFAULT:all
+
+.PHONY:all clean help ASM SO TAGS WASM JS exe IR WAST A ADBG AST cppcheck DOCKER
+
+all:exe
+
+everything:$(TARGET) A ASM SO $(TARGET)-static $(TARGET)-dbg ADBG TAGS $(TARGET)-cov WASM JS IR WAST AST DOCKER
+
+depend:.depend
+
+.depend:$(SRCS)
+	rm -rf .depend
+	$(CXX) -MM $(CXX_FLAGS) $^ > ./.depend
+	echo $(patsubst %.o:, %.odbg:, $(shell $(CXX) -MM $(CXX_FLAGS) $^)) | sed -r 's/[A-Za-z0-9\-\_]+\.odbg/\n&/g' >> ./.depend
+	echo $(patsubst %.o:, %.ocov:, $(shell $(CXX) -MM $(CXX_FLAGS) $^)) | sed -r 's/[A-Za-z0-9\-\_]+\.ocov/\n&/g' >> ./.depend
+
+-include ./.depend
+
+.cpp.o: header.hpp.gch
+	$(CXX) $(CXX_FLAGS) -c $< -o $@
+
+%.odbg:%.cpp
+	$(CXX) $(CXX_FLAGS) -g -c $< -o $@
+
+%.ocov:%.cpp
+	$(CXX) $(CXX_FLAGS) $(COV_CXX) -c $< -o $@
+
+header.hpp.gch:header.hpp
+	$(CXX) $(CXX_FLAGS) -c $< -o $@
+
+exe: header.hpp.gch $(TARGET)
+
+$(TARGET): $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -o $@
+
+$(TARGET)-static: $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -static -o $@
+
+$(TARGET)-dbg: $(OBJ_DBG_LIST)
+	$(CXX) $(LD_FLAGS) $^ -g -o $@
+
+$(TARGET)-cov: $(OBJ_COV_LIST)
+	$(CXX) $(LD_FLAGS) $^ $(COV_LD) -o $@
+
+cov: runcov
+	@llvm-profdata merge -sparse ./default.profraw -o ./default.profdata
+	@llvm-cov show $(TARGET)-cov -instr-profile=default.profdata
+
+covrep: runcov
+	@llvm-profdata merge -sparse ./default.profraw -o ./default.profdata
+	@llvm-cov report $(TARGET)-cov -instr-profile=default.profdata
+
+ASM:$(ASM_LIST)
+
+SO:$(TARGET).so
+
+A:$(TARGET).a
+
+ADBG:$(TARGET).adbg
+
+IR:$(IR_LIST)
+
+WASM:$(WASM_LIST)
+
+WAST:$(WAST_LIST)
+
+JS:$(JS_LIST)
+
+AST:$(AST_LIST)
+
+TAGS:tags
+
+#https://github.com/rizsotto/Bear
+BEAR: clean
+	bear make
+
+tags:$(SRCS)
+	$(shell $(CXX) -c -I $(CTAGS_I_PATH) -M $(SRCS)|\
+		sed -e 's/[\\ ]/\n/g'|sed -e '/^$$/d' -e '/\.o:[ \t]*$$/d'|\
+		ctags -L - --c++-kinds=+p --fields=+iaS --extra=+q)
+
+%.s: %.cpp
+	$(CXX) -S $< -o $@
+	# objdump -r -d -M intel -S $< > $@
+
+%.ir: %.cpp
+	$(CXX) -emit-llvm -S -o $@ $<
+
+%.wasm: %.cpp
+	em++ $< -o $@
+
+%.wast: %.wasm
+	wasm2wat $< > $@
+
+%.js: %.cpp
+	em++ $< -s FORCE_FILESYSTEM=1 -s EXIT_RUNTIME=1 -o $@
+
+%.ast: %.cpp
+	$(CXX) -Xclang -ast-dump -fsyntax-only $< > $@
+
+$(TARGET).so: $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -shared -o $@
+
+$(TARGET).a: $(OBJ_LIST)
+	ar rcs $(TARGET).a $(OBJ_LIST)
+
+$(TARGET).adbg: $(OBJ_DBG_LIST)
+	ar rcs $(TARGET).adbg $(OBJ_DBG_LIST)
+
+runcov: $(TARGET)-cov
+	$(TARGET)-cov
+
+test: $(TARGET)
+	$(TARGET)
+
+run: $(TARGET)
+	"./$(TARGET)"
+
+valgrind: $(TARGET)
+	- valgrind --track-origins=yes --leak-check=full --show-leak-kinds=all $(TARGET)
+
+cppcheck:
+	cppcheck $(SRCS)
+
+rundbg: $(TARGET)-dbg
+	gdb --batch --command=./debug.dbg --args $(TARGET)-dbg
+
+format:
+	- clang-format -i $(SRCS) $(HDRS)
+
+DOCKER: Dockerfile
+	docker buld -t proto ./
+
+clean:
+	- rm -f *.o *.dis *.odbg *.ocov *.js *.ir *~ $(TARGET) $(TARGET).so $(TARGET)-static \
+		$(TARGET)-dbg $(TARGET).a $(TARGET)-cov *.wasm *.wast $(TARGET).adbg *.ast
+
+deepclean: clean
+	- rm tags
+	- rm .depend
+	- rm ./default.profraw ./default.profdata
+	- rm vgcore.*
+	- rm compile_commands.json
+	- rm *.gch
+
+help:
+	@echo "--all is the default target, runs $(TARGET) target"
+	@echo "--everything will build everything"
+	@echo "--SO will generate the so"
+	@echo "--ASM will generate assembly files"
+	@echo "--TAGS will generate tags file"
+	@echo "--BEAR will generate a compilation database"
+	@echo "--IR will generate llvm IR"
+	@echo "--$(TARGET) builds the dynamically-linked executable"
+	@echo "--$(TARGET)-dbg will generate the debug build. BUILD_MODE should be set to DEBUG to work"
+	@echo "--$(TARGET)-static will statically link the executable to the libraries"
+	@echo "--$(TARGET)-cov is the coverage build"
+	@echo "--cov will print the coverage report"
+	@echo "--covrep will print the line coverage report"
+	@echo "--A will build the static library"
+	@echo "--TAGS will build the tags file"
+	@echo "--clean"
+	@echo "--deepclean will clean almost everything"
diff --git a/1672/header.hpp b/1672/header.hpp
new file mode 100644
index 0000000..2df2a5a
--- /dev/null
+++ b/1672/header.hpp
@@ -0,0 +1,4 @@
+
+#include <iostream>
+#include <string>
+#include <vector>
diff --git a/1672/main.cpp b/1672/main.cpp
new file mode 100644
index 0000000..50397e9
--- /dev/null
+++ b/1672/main.cpp
@@ -0,0 +1,28 @@
+#include "header.hpp"
+#include <algorithm>
+
+class Solution {
+public:
+  static int maximumWealth(std::vector<std::vector<int>> &accounts) {
+    int i_max = 0;
+    int sum_max = 0;
+    int sum_cur = 0;
+    for (int i = 0; i < accounts.size(); ++i) {
+      for (int j = 0; j < accounts[i].size(); ++j) {
+        sum_cur += accounts[i][j];
+      }
+      if (sum_cur > sum_max) {
+        sum_max = sum_cur;
+        i_max = i;
+      }
+      sum_cur = 0;
+    }
+    return sum_max;
+  }
+};
+
+int main(int argc, char **argv) {
+  std::vector<std::vector<int>> accounts = {{1, 2, 3}, {3, 2, 1}};
+  std::cout << Solution::maximumWealth(accounts);
+  return 0;
+}
diff --git a/1672/makefile b/1672/makefile
new file mode 100644
index 0000000..d5e9dc0
--- /dev/null
+++ b/1672/makefile
@@ -0,0 +1,238 @@
+TARGET?=main
+SHELL=bash
+SHELL?=bash
+CXX=clang++
+CXX?=clang++
+ifdef OS
+CXX_FLAGS=-std=c++20
+else
+CXX_FLAGS=-std=c++20 -fpic
+endif
+CXX_EXTRA?=
+CTAGS_I_PATH?=./
+LD_FLAGS= -include-pch header.hpp.gch
+EXTRA_LD_FLAGS?=
+ADD_SANITIZERS_CC= -g -fsanitize=address -fno-omit-frame-pointer
+ADD_SANITIZERS_LD= -g -fsanitize=address
+MEM_SANITIZERS_CC= -g -fsanitize=memory -fno-omit-frame-pointer
+MEM_SANITIZERS_LD= -g -fsanitize=memory
+UB_SANITIZERS_CC= -g -fsanitize=undefined -fno-omit-frame-pointer
+UB_SANITIZERS_LD= -g -fsanitize=undefined
+FUZZ_SANITIZERS_CC= -fsanitize=fuzzer,address -g -fno-omit-frame-pointer
+FUZZ_SANITIZERS_LD= -fsanitize=fuzzer,address -g -fno-omit-frame-pointer
+COV_CXX= -fprofile-instr-generate -fcoverage-mapping
+COV_LD= -fprofile-instr-generate
+# BUILD_MODES are=RELEASE(default), DEBUG,ADDSAN,MEMSAN,UBSAN,FUZZ
+BUILD_MODE?=RELEASE
+#EXCLUSION_LIST='(\bdip)|(\bdim)'
+EXCLUSION_LIST='xxxxxx'
+OBJ_LIST:=$(patsubst %.cpp, %.o, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+OBJ_COV_LIST:=$(patsubst %.cpp, %.ocov, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+OBJ_DBG_LIST:=$(patsubst %.cpp, %.odbg, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+ASM_LIST:=$(patsubst %.cpp, %.s, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+WASM_LIST:=$(patsubst %.cpp, %.wasm, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+WAST_LIST:=$(patsubst %.cpp, %.wast, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+IR_LIST:=$(patsubst %.cpp, %.ir, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+JS_LIST:=$(patsubst %.cpp, %.js, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+AST_LIST:=$(patsubst %.cpp, %.ast, $(shell find . -name '*.cpp' | grep -Ev $(EXCLUSION_LIST)))
+
+ifeq ($(BUILD_MODE), ADDSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(ADD_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(ADD_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), MEMSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(MEM_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(MEM_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), UBSAN)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(UB_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(UB_SANITIZERS_LD)
+endif
+
+ifeq ($(BUILD_MODE), FUZZ)
+ifeq ($(CXX), g++)
+$(error This build mode is only useable with clang++.)
+endif
+CXX_EXTRA+=$(FUZZ_SANITIZERS_CC)
+EXTRA_LD_FLAGS+=$(FUZZ_SANITIZERS_LD)
+endif
+
+SRCS:=$(wildcard *.cpp)
+HDRS:=$(wildcard *.h)
+CXX_FLAGS+=$(CXX_EXTRA)
+LD_FLAGS+=$(EXTRA_LD_FLAGS)
+
+.DEFAULT:all
+
+.PHONY:all clean help ASM SO TAGS WASM JS exe IR WAST A ADBG AST cppcheck DOCKER
+
+all:exe
+
+everything:$(TARGET) A ASM SO $(TARGET)-static $(TARGET)-dbg ADBG TAGS $(TARGET)-cov WASM JS IR WAST AST DOCKER
+
+depend:.depend
+
+.depend:$(SRCS)
+	rm -rf .depend
+	$(CXX) -MM $(CXX_FLAGS) $^ > ./.depend
+	echo $(patsubst %.o:, %.odbg:, $(shell $(CXX) -MM $(CXX_FLAGS) $^)) | sed -r 's/[A-Za-z0-9\-\_]+\.odbg/\n&/g' >> ./.depend
+	echo $(patsubst %.o:, %.ocov:, $(shell $(CXX) -MM $(CXX_FLAGS) $^)) | sed -r 's/[A-Za-z0-9\-\_]+\.ocov/\n&/g' >> ./.depend
+
+-include ./.depend
+
+.cpp.o: header.hpp.gch
+	$(CXX) $(CXX_FLAGS) -c $< -o $@
+
+%.odbg:%.cpp
+	$(CXX) $(CXX_FLAGS) -g -c $< -o $@
+
+%.ocov:%.cpp
+	$(CXX) $(CXX_FLAGS) $(COV_CXX) -c $< -o $@
+
+header.hpp.gch:header.hpp
+	$(CXX) $(CXX_FLAGS) -c $< -o $@
+
+exe: header.hpp.gch $(TARGET)
+
+$(TARGET): $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -o $@
+
+$(TARGET)-static: $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -static -o $@
+
+$(TARGET)-dbg: $(OBJ_DBG_LIST)
+	$(CXX) $(LD_FLAGS) $^ -g -o $@
+
+$(TARGET)-cov: $(OBJ_COV_LIST)
+	$(CXX) $(LD_FLAGS) $^ $(COV_LD) -o $@
+
+cov: runcov
+	@llvm-profdata merge -sparse ./default.profraw -o ./default.profdata
+	@llvm-cov show $(TARGET)-cov -instr-profile=default.profdata
+
+covrep: runcov
+	@llvm-profdata merge -sparse ./default.profraw -o ./default.profdata
+	@llvm-cov report $(TARGET)-cov -instr-profile=default.profdata
+
+ASM:$(ASM_LIST)
+
+SO:$(TARGET).so
+
+A:$(TARGET).a
+
+ADBG:$(TARGET).adbg
+
+IR:$(IR_LIST)
+
+WASM:$(WASM_LIST)
+
+WAST:$(WAST_LIST)
+
+JS:$(JS_LIST)
+
+AST:$(AST_LIST)
+
+TAGS:tags
+
+#https://github.com/rizsotto/Bear
+BEAR: clean
+	bear make
+
+tags:$(SRCS)
+	$(shell $(CXX) -c -I $(CTAGS_I_PATH) -M $(SRCS)|\
+		sed -e 's/[\\ ]/\n/g'|sed -e '/^$$/d' -e '/\.o:[ \t]*$$/d'|\
+		ctags -L - --c++-kinds=+p --fields=+iaS --extra=+q)
+
+%.s: %.cpp
+	$(CXX) -S $< -o $@
+	# objdump -r -d -M intel -S $< > $@
+
+%.ir: %.cpp
+	$(CXX) -emit-llvm -S -o $@ $<
+
+%.wasm: %.cpp
+	em++ $< -o $@
+
+%.wast: %.wasm
+	wasm2wat $< > $@
+
+%.js: %.cpp
+	em++ $< -s FORCE_FILESYSTEM=1 -s EXIT_RUNTIME=1 -o $@
+
+%.ast: %.cpp
+	$(CXX) -Xclang -ast-dump -fsyntax-only $< > $@
+
+$(TARGET).so: $(OBJ_LIST)
+	$(CXX) $(LD_FLAGS) $^ -shared -o $@
+
+$(TARGET).a: $(OBJ_LIST)
+	ar rcs $(TARGET).a $(OBJ_LIST)
+
+$(TARGET).adbg: $(OBJ_DBG_LIST)
+	ar rcs $(TARGET).adbg $(OBJ_DBG_LIST)
+
+runcov: $(TARGET)-cov
+	$(TARGET)-cov
+
+test: $(TARGET)
+	$(TARGET)
+
+run: $(TARGET)
+	"./$(TARGET)"
+
+valgrind: $(TARGET)
+	- valgrind --track-origins=yes --leak-check=full --show-leak-kinds=all $(TARGET)
+
+cppcheck:
+	cppcheck $(SRCS)
+
+rundbg: $(TARGET)-dbg
+	gdb --batch --command=./debug.dbg --args $(TARGET)-dbg
+
+format:
+	- clang-format -i $(SRCS) $(HDRS)
+
+DOCKER: Dockerfile
+	docker buld -t proto ./
+
+clean:
+	- rm -f *.o *.dis *.odbg *.ocov *.js *.ir *~ $(TARGET) $(TARGET).so $(TARGET)-static \
+		$(TARGET)-dbg $(TARGET).a $(TARGET)-cov *.wasm *.wast $(TARGET).adbg *.ast
+
+deepclean: clean
+	- rm tags
+	- rm .depend
+	- rm ./default.profraw ./default.profdata
+	- rm vgcore.*
+	- rm compile_commands.json
+	- rm *.gch
+
+help:
+	@echo "--all is the default target, runs $(TARGET) target"
+	@echo "--everything will build everything"
+	@echo "--SO will generate the so"
+	@echo "--ASM will generate assembly files"
+	@echo "--TAGS will generate tags file"
+	@echo "--BEAR will generate a compilation database"
+	@echo "--IR will generate llvm IR"
+	@echo "--$(TARGET) builds the dynamically-linked executable"
+	@echo "--$(TARGET)-dbg will generate the debug build. BUILD_MODE should be set to DEBUG to work"
+	@echo "--$(TARGET)-static will statically link the executable to the libraries"
+	@echo "--$(TARGET)-cov is the coverage build"
+	@echo "--cov will print the coverage report"
+	@echo "--covrep will print the line coverage report"
+	@echo "--A will build the static library"
+	@echo "--TAGS will build the tags file"
+	@echo "--clean"
+	@echo "--deepclean will clean almost everything"
diff --git a/876/main.cpp b/876/main.cpp
index e9a9288..20d49ad 100644
--- a/876/main.cpp
+++ b/876/main.cpp
@@ -19,10 +19,11 @@ public:
       heads.push_back(head);
       head = head->next;
     }
+    heads.push_back(head);
 
     int size = heads.size();
     std::cout << "size:" << size << "\n";
-    return heads[(size / 2) - ((size - 1) % 2) + 1];
+    return heads[int(size / 2)];
   }
 };