Compilare: user.cpp: In function ‘int main()’: user.cpp:92:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<g[i].size();++k) ^ user.cpp:113:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<gt[nu].size();++i) ^ user.cpp:48:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("munte2.in","r",stdin); ^ user.cpp:49:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("munte2.out","w",stdout); ^ user.cpp:53:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&K,&l); ^ user.cpp:55:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&punct[i].x,&punct[i].y); ^