Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for(i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:100:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | for(a = 0; a < comp[i].size(); a++) | ~~^~~~~~~~~~~~~~~~ main.cpp:101:30: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for(b = a + 1; b < comp[i].size(); b++) | ~~^~~~~~~~~~~~~~~~