Compilare: user.cpp: In function ‘int main()’: user.cpp:57:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen ("go.in","r",stdin); ^ user.cpp:58:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("go.out","w",stdout); ^ user.cpp:60:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:63:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] {scanf("%d",&ma[i][j]); ^ user.cpp:90:23: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d",x-1,y-1); ^ user.cpp:90:23: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized]