Compilare: user.cpp: In function ‘void calc(int)’: user.cpp:50:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < cv.size(); ++i) { ~~^~~~~~~~~~~ user.cpp:57:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i!=cv.size()-1) ~^~~~~~~~~~~~~ user.cpp:65:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<cv.size()-1;++i)dp[comp]=max(dp[comp],Suf[i+1]+P[i]); ~^~~~~~~~~~~~ user.cpp:66:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<cv.size();++i)dp[comp]=max(dp[comp],P[i]); ~^~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:85:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pastrafaceri.in", "r", stdin); ^ user.cpp:86:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pastrafaceri.out", "w", stdout); ^ user.cpp:87:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:89:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &val[i]); ^ user.cpp:94:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^