Compilare: main.cpp: In function 'void dfs(int)': main.cpp:60:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void dfsHeavyFirst(int)': main.cpp:83:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for(i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~