from math import sqrt
import sys

def f(n):
    return (n*(n+1))//2

N=int(input())

d=int((sqrt(8*N+1)-1)/2)

for h in range(max(0,d-3),d+4):
    if f(h)==N:
        print("YES")
        print(h)
        sys.exit()
        
print("NO")