Eroare de compilare: main.cpp: In function 'void solve_and_write()': main.cpp:21:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for (k = 0; k < G[j].size(); k++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void read_data()': main.cpp:34:38: error: 'class std::vector<int>' has no member named 'pb' 34 | scanf("%d %d", &a, &b), G[a].pb(b), deg[b]++; | ^~ Non zero exit status: 1