Compilare: user.cpp: In function ‘int Del(int, int)’: user.cpp:17:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void Solve(int, int)’: user.cpp:44:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(l1++;l1<v[nod].size();l1++) ^ user.cpp:60:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(l2++;l2<v[nod].size();l2++) ^ user.cpp:27:29: warning: unused variable ‘pas’ [-Wunused-variable] { int i,nod,stp,l1,l2,ans,pas=0; ^ user.cpp: In function ‘int main()’: user.cpp:83:9: warning: unused variable ‘j’ [-Wunused-variable] { int i,j,vv,caz,x,y,a,b; ^