Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:17:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(i=0;i<v[nod].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp: In function 'void solve_cer2()': main.cpp:59:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(i=0;i<v[curent.first.first].size();i++){ | ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~