Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:56:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~