Compilare: user.cpp: In function ‘void df(int)’: user.cpp:20:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++) ^ user.cpp:24:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<b[fiu].size();j++) ^ user.cpp:26:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+1>b[nod].size()-1)b[nod].push_back(v[nod]); ^ user.cpp:29:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j>b[nod].size()-1)b[nod].push_back(b[fiu][j]); ^ user.cpp:33:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<c[fiu].size();j++) ^ user.cpp:35:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+1>c[nod].size()-1)c[nod].push_back(v[nod]); ^ user.cpp:39:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j>c[nod].size()-1)c[nod].push_back(c[fiu][j]); ^