Compilare: main.cpp: In function 'int main()': main.cpp:26:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("intrus.in", "r", stdin); ^ main.cpp:27:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("intrus.out", "w", stdout); ^ main.cpp:35:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ main.cpp:37:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &d); ^ main.cpp:40:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^ main.cpp:47:18: warning: iteration 999999 invokes undefined behavior [-Waggressive-loop-optimizations] if (frecv[i] > 1) ~~~~~~~^ main.cpp:46:23: note: within this loop for (int i = 1; i <= DIM; i++) ~~^~~~~~ main.cpp:30:15: warning: iteration 999998 invokes undefined behavior [-Waggressive-loop-optimizations] if (ciur[i] == false) { ~~~~~~^ main.cpp:29:21: note: within this loop for (int i = 2; i <= DIM; i++) ~~^~~~~~