Compilare: main.cpp: In function 'void bfs(int, int*)': main.cpp:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(i=0; i<a[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp:11:9: warning: unused variable 'x0' [-Wunused-variable] 11 | int x0=nod; | ^~ main.cpp: In function 'int main()': main.cpp:31:34: warning: unused variable 'gata' [-Wunused-variable] 31 | int n,m,x,y,nd1,nd2,i,d,nr=0,gata=0; | ^~~~