just why WA 1?
#include<iostream>
using namespace std;
int main() {
  int l, n, k;
  cin>>l>>n;
  while(n--){
    cin>>k;
    if(l<=k) {cout<<"YES"; return 0;}
    l-=k;
    l+=l%k;
  }
  cout<<"NO";
  return 0;
}