Compilare: main.cpp: In function 'void solve(int)': main.cpp:21:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(h = 0; h < g[nod].size(); h++) | ~~^~~~~~~~~~~~~~~ main.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(h = 0; h < g[nod].size(); h++) | ~~^~~~~~~~~~~~~~~