Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:22:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:31:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(x = 0; x < g[j].size(); x++) | ~~^~~~~~~~~~~~~ main.cpp:18:11: warning: unused variable 'nod' [-Wunused-variable] 18 | ll i, nod, j, x, prod, sum; | ^~~ main.cpp:18:22: warning: unused variable 'prod' [-Wunused-variable] 18 | ll i, nod, j, x, prod, sum; | ^~~~