Compilare: user.cpp: In function ‘void solve()’: user.cpp:97:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[1].size();i++) ^ user.cpp:100:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<G[t].size();j++) ^ user.cpp:105:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t=0;t<G[j].size();t++) ^ user.cpp:111:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<G[j+1].size();k++) ^ user.cpp:120:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<G[n].size();j++) ^