Compilare: user.cpp: In function ‘int main()’: user.cpp:48:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g.size(); i++) { ^ user.cpp:52:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[node.n1].size(); j++) { ^ user.cpp:78:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[x].size(); i++) { ^