Compilare: user.cpp: In function ‘int main()’: user.cpp:30:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zoro.in", "r", stdin); ^ user.cpp:31:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zoro.out", "w", stdout); ^ user.cpp:32:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:35:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &ma[i][j]); } } ^ user.cpp: In function ‘void bkt(int, int)’: user.cpp:6:21: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] void bkt(int x, int y) { ^ user.cpp:6:14: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] void bkt(int x, int y) { ^