Compilare: main.cpp: In function 'void dfs(int)': main.cpp:27:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | while(used[start] < v[start].size()) { | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void print()': main.cpp:46:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i = 0; i < ord.size(); i++) | ~~^~~~~~~~~~~~