update

3 files changed, 318 insertions, 0 deletions

diff --git a/923/header.hpp b/923/header.hpp
new file mode 100644
index 0000000..2df2a5a
--- /dev/null
+++ b/923/header.hpp
@@ -0,0 +1,4 @@
+
+#include <iostream>
+#include <string>
+#include <vector>
diff --git a/923/main.cpp b/923/main.cpp
new file mode 100644
index 0000000..3e0349e
--- /dev/null
+++ b/923/main.cpp
@@ -0,0 +1,76 @@
+#include "header.hpp"
+#include <algorithm>
+#include <cmath>
+#include <map>
+#include <utility>
+
+int fact(int n) {
+  int64_t result = 1;
+  for (int i = 1; i <= n; ++i) {
+    result *= i;
+  }
+  return result;
+}
+
+int selection(int n, int m) {
+  return (fact(m) / (fact(n) * fact(std::abs(m - n))));
+}
+
+class Solution {
+public:
+  static int threeSumMulti(std::vector<int> &arr, int target) {
+    int MOD = 1000000007;
+    long ans = 0;
+    std::sort(arr.begin(), arr.end());
+
+    for (int i = 0; i < arr.size(); ++i) {
+      // We'll try to find the number of i < j < k
+      // with A[j] + A[k] == T, where T = target - A[i].
+
+      // The below is a "two sum with multiplicity".
+      int T = target - arr[i];
+      int j = i + 1, k = arr.size() - 1;
+
+      while (j < k) {
+        // These steps proceed as in a typical two-sum.
+        if (arr[j] + arr[k] < T)
+          j++;
+        else if (arr[j] + arr[k] > T)
+          k--;
+        else if (arr[j] != arr[k]) { // We have A[j] + A[k] == T.
+          // Let's count "left": the number of A[j] == A[j+1] == A[j+2] == ...
+          // And similarly for "right".
+          int left = 1, right = 1;
+          while (j + 1 < k && arr[j] == arr[j + 1]) {
+            left++;
+            j++;
+          }
+          while (k - 1 > j && arr[k] == arr[k - 1]) {
+            right++;
+            k--;
+          }
+
+          ans += left * right;
+          ans %= MOD;
+          j++;
+          k--;
+        } else {
+          // M = k - j + 1
+          // We contributed M * (M-1) / 2 pairs.
+          ans += (k - j + 1) * (k - j) / 2;
+          ans %= MOD;
+          break;
+        }
+      }
+    }
+
+    return (int)ans;
+  }
+};
+
+int main(int argc, char **argv) {
+  std::vector<int> arr = {1, 1, 2, 2, 3, 3, 4, 4, 5, 5};
+  auto target = 8;
+  std::cout << Solution::threeSumMulti(arr, target) << "\n";
+  return 0;
+}
diff --git a/923/makefile b/923/makefile
new file mode 100644
index 0000000..d5e9dc0
--- /dev/null
+++ b/923/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"