update

1 files changed, 43 insertions, 0 deletions

diff --git a/59/main.cpp b/59/main.cpp
new file mode 100644
index 0000000..aaba2f1
--- /dev/null
+++ b/59/main.cpp
@@ -0,0 +1,43 @@
+#include "header.hpp"
+
+class Solution {
+public:
+  static int floorMod(int x, int y) { return ((x % y) + y) % y; }
+
+  static std::vector<std::vector<int>> generateMatrix(int n) {
+    std::vector<std::vector<int>> result(n, std::vector<int>(n));
+    int cnt = 1;
+    int dir[4][2] = {{0, 1}, {1, 0}, {0, -1}, {-1, 0}};
+    int d = 0;
+    int row = 0;
+    int col = 0;
+    while (cnt <= n * n) {
+      result[row][col] = cnt++;
+      int r = floorMod(row + dir[d][0], n);
+      int c = floorMod(col + dir[d][1], n);
+
+      if (result[r][c] != 0)
+        d = (d + 1) % 4;
+      row += dir[d][0];
+      col += dir[d][1];
+    }
+    return result;
+  }
+};
+
+void pprint(std::vector<std::vector<int>> matrix) {
+  for (auto &iter : matrix) {
+    for (auto &ya_iter : iter) {
+      std::cout << ya_iter << " ";
+    }
+    std::cout << "\n";
+  }
+}
+
+int main(int argc, char **argv) {
+  pprint(Solution::generateMatrix(3));
+  pprint(Solution::generateMatrix(4));
+  pprint(Solution::generateMatrix(5));
+  pprint(Solution::generateMatrix(33));
+  return 0;
+}