Compilare: user.cpp: In function ‘int main()’: user.cpp:44:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<q.size();j++) ^ user.cpp:47:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<g[nod].size();k++) ^ user.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<q.size();j++) ^ user.cpp:60:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<g[nod].size();k++) ^