Compilare: user.cpp: In function ‘int main()’: user.cpp:26:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<g[i].size();j++) ^ user.cpp:30:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<g[nod].size();k++) ^ user.cpp:66:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0;k<gr[j].size();k++) ^ user.cpp:74:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(gr[j].size()-kk==c-gra[i]) ^ user.cpp:80:13: warning: ‘kk’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(kk==c-gra[i]) ^