Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:11:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp:18:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i1].size();j++) ^ user.cpp:26:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i1].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:41:9: warning: variable ‘poz’ set but not used [-Wunused-but-set-variable] int x,y,poz,maxim=0; ^ user.cpp:38:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.in","r",stdin); ^ user.cpp:39:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.out","w",stdout); ^ user.cpp:40:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:44:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^