Compilare: main.cpp: In function 'void solve()': main.cpp:39:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (int j = 1; j < edges[i].size() - 1; j++) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:41:76: warning: operation on 'j' may be undefined [-Wsequence-point] 41 | edges[j].erase(edges[j].begin() + j--); | ~^~