Compilare: main.cpp: In function 'int main()': main.cpp:55:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < V[p].size(); j++ ) ~~^~~~~~~~~~~~~ main.cpp:67:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < V[p].size(); j++ ) ~~^~~~~~~~~~~~~