Compilare: main.cpp: In function 'int main()': main.cpp:66:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int l = 0; l < h[k].size(); l++) | ~~^~~~~~~~~~~~~ main.cpp:67:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (int p = l + 1; p < h[k].size(); p++) | ~~^~~~~~~~~~~~~ main.cpp:70:34: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 70 | if (ok && res.size() == n - 1) | ~~~~~~~~~~~^~~~~~~~