Compilare: user.cpp: In function ‘int main()’: user.cpp:24:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<adj[i].size();j++) ^ user.cpp:26:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<adj[i].size();j++) { ^ user.cpp:28:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p=0;p<adj[a].size();p++) ^ user.cpp:32:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<adj[i].size();j++) ^