Compilare: main.cpp: In function 'int main()': main.cpp:36:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for (int i=p[nod];i<l[nod].size();i++) { | ~^~~~~~~~~~~~~~ main.cpp:49:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for (int i=0;i<sol.size()-1;i++) | ~^~~~~~~~~~~~~