Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:14:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[x].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:43:101: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%I64d\n", (long long)N*(N-1)/2-(long long)nr[0]*(nr[0]-1)/2-(long long)nr[1]*(nr[1]-1)/2); ^