Compilare: main.cpp: In function 'int main()': main.cpp:138:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("rascoala.in", "r", stdin); ^ main.cpp:139:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("rascoala.out", "w", stdout); ^ main.cpp:141:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &c, &n, &m, &k); ^ main.cpp:144:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^ main.cpp:158:11: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d\n%d\n", cnt(ans), ans); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~