Compilare: user.cpp: In function ‘int main()’: user.cpp:79:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<x.size();i++) // al 2lea ^ user.cpp:83:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind<v.size() && v[ind].first<=x[i].first) ^ user.cpp:85:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[ind].first<=x[i].first && ind<v.size()) ^ user.cpp:125:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v2.size();i++) ^ user.cpp:57:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secvmax.in","r", stdin); ^ user.cpp:58:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secvmax.out","w", stdout); ^ user.cpp:59:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:64:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&elm); ^ user.cpp:72:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&elm); ^