Compilare: main.cpp: In function 'long long int bfs(long long int)': main.cpp:25:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for(i=0; i<adj[curr].size(); i++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:63:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(i=0; i<adj[n].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp:47:19: warning: unused variable 'j' [-Wunused-variable] 47 | long long n,i,j,k,l,a,b,x,m; | ^ main.cpp:47:23: warning: unused variable 'l' [-Wunused-variable] 47 | long long n,i,j,k,l,a,b,x,m; | ^