Compilare: user.cpp: In function ‘int main()’: user.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=G[X].size();i++) ^ user.cpp:28:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=G[q[p]].size();i++) ^ user.cpp:32:50: warning: operation on ‘p’ may be undefined [-Wsequence-point] q[++p]=G[q[p]][i]; ^ user.cpp:35:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<=G[G[q[p]][i]].size();j++) ^