Compilare: user.cpp: In function ‘int main()’: user.cpp:40:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<V[i].size();j++) ^ user.cpp:55:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<V[i].size();j++) ^ user.cpp:78:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<rez.size();i++) ^ user.cpp:24:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ar.in","r",stdin); ^ user.cpp:25:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&r); ^ user.cpp:28:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^