Compilare: user.cpp: In function ‘void dfs(int, int&, int)’: user.cpp:45:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[x].size(); ++i) ^ user.cpp: In function ‘void solve2()’: user.cpp:89:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[vecin].size() && drag[drag_cur] >= G[vecin][i].second; ++i) ^