Compilare: user.cpp: In function ‘int main()’: user.cpp:73:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<V.size();i++){ ^ user.cpp:81:47: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<std::pair<long int, long int> >::size_type {aka unsigned int}’ [-Wformat=] printf("%ld %ld %ld",V.size(),maxV,maxCont); ^ user.cpp:53:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri2.in","r",stdin); ^ user.cpp:54:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri2.out","w",stdout); ^ user.cpp:56:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&m); ^ user.cpp:58:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j=1;j<=m;j++) scanf("%ld",&a[i][j]); ^