Compilare: main.cpp: In function 'void bfs(int)': main.cpp:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();++i){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();++i){ ~^~~~~~~~~~~~~~ main.cpp:38:23: warning: variable 'cate' set but not used [-Wunused-but-set-variable] int n,m,s,d,i,a,b,cate,j,nod,nod1,M; ^~~~