Compilare: main.cpp: In function 'void bfs(int)': main.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(i=0;i<a[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:36:12: warning: unused variable 'j' [-Wunused-variable] 36 | {int n,m,i,j,x,y,nr=0,s; | ^ main.cpp:36:18: warning: unused variable 'nr' [-Wunused-variable] 36 | {int n,m,i,j,x,y,nr=0,s; | ^~