Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:20:18: 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] 20 | for(i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:35:30: 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] 35 | for(x = 0; x < divs[j].size(); x++) | ~~^~~~~~~~~~~~~~~~ main.cpp:17:11: warning: unused variable 'nod' [-Wunused-variable] 17 | ll i, nod, j, x, prod, sum, gcd; | ^~~ main.cpp:17:22: warning: unused variable 'prod' [-Wunused-variable] 17 | ll i, nod, j, x, prod, sum, gcd; | ^~~~ main.cpp:17:33: warning: unused variable 'gcd' [-Wunused-variable] 17 | ll i, nod, j, x, prod, sum, gcd; | ^~~ main.cpp: In function 'int main()': main.cpp:76:22: 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] 76 | for(x = 0; x < primes.size(); x++) | ~~^~~~~~~~~~~~~~~ main.cpp:70:11: warning: unused variable 'j' [-Wunused-variable] 70 | ll i, j, a, b, x; | ^