#include<stdio.h>
#include<limits.h>
typedef long long ll;
ll N;
int chk(ll x){
  ll sm=x*(x+1)/2;
  return sm<=N;
}
int main(){
  scanf("%lld",&N);
  ll ok=0,ng=INT_MAX;
  while(ok+1!=ng){
    ll x=(ok+ng)/2;
    if(chk(x)) ok=x;
    else ng=x;
  }
  if(N==ok*(ok+1)/2){
    printf("YES\n%lld",ok);
  }
  else{
    printf("NO");
  }
}