Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:16:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i++ ) ^ user.cpp: In function ‘int main()’: user.cpp:75:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < aux.size(); j++ ){ ^ user.cpp:87:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < sol[i].size(); j++ ) ^