Compilare: user.cpp: In function ‘int check(int)’: user.cpp:22:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( dp[i+k-1][j+k-1]-dp[i-1][j-1]<=W && ds[i+k-1][j-k+2]-ds[i-1][j+2]<=W ) ^ user.cpp:22:78: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( dp[i+k-1][j+k-1]-dp[i-1][j-1]<=W && ds[i+k-1][j-k+2]-ds[i-1][j+2]<=W ) ^ user.cpp: In function ‘void read()’: user.cpp:12:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&W); ^ user.cpp:15:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%llu",&a[i][j]); ^ user.cpp: In function ‘int main()’: user.cpp:46:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plantatii.in","r",stdin); ^ user.cpp:47:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plantatii.out","w",stdout); ^ user.cpp:49:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^