def f(x):
  return x*(x+1)//2
n=int(input())
ng=0
ok=2*10**18
cnt=0
while ok-ng>1:
  mid=(ok+ng)//2
  if f(mid)>=n:
    ok=mid
  else:
    ng=mid
if f(mid)==n:
  print("YES")
  print(ok)
else:
  print("NO")