Compilare: user.cpp: In function ‘void cup(long int)’: user.cpp:14:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘bool dfs(long int)’: user.cpp:48:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:75:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.in","r",stdin); ^ user.cpp:76:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld%ld",&n,&m,&e); ^ user.cpp:80:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld",&u,&v); ^