Compilare: user.cpp: In function ‘int main()’: user.cpp:67:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<secv.size();i++) ^ user.cpp:85:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(imax<=(secv.size()-1) && imax>0 &&secv[imax-1].second==secv[imax].second && (secv[imax].first+secv[imax-1].first)>=3) ^ user.cpp:100:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<secv.size();i++) ^ user.cpp:105:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<secv.size();i++) ^ user.cpp:9:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arc.in","r",stdin); ^ user.cpp:10:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arc.out","w",stdout); ^ user.cpp:11:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&p); ^ user.cpp:14:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:15:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ user.cpp:19:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&y); ^ user.cpp:28:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:31:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^