#include <iostream.h>

int main()
{
 long S,N,Sum;
 bool X;
 int A[30000];
 cin>>S;cin>>N;
 Sum=0;X=1;
 for(long i=1;i<=S;i++)cin>>A[i];
 for(long i=S;i>=1;i--)
 {
  Sum+=A[i];
  if(Sum>S-i+1+N)X=0;
 }
 if(X==0) cout<<"NO"; else cout<<"YES";
         return 0;
}

it has to ba int A[30001] not int A[30000]

just try it

Edited by author 23.07.2004 04:20

Edited by author 23.07.2004 04:20