Compilare: main.cpp: In function 'void dfs(long long int, long long int, long long int)': main.cpp:37:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(i=0; i<adj[curr].size(); i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:100:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 100 | for(j=0; j<vec[i].size(); j++) | ~^~~~~~~~~~~~~~ main.cpp:108:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 108 | for(j=0; j<adj[i].size(); j++) | ~^~~~~~~~~~~~~~ main.cpp:48:23: warning: unused variable 'l' [-Wunused-variable] 48 | long long n,i,j,k,l,m,a,b; | ^