from decimal import Decimal
import math
n = int(input())
f1 = Decimal(str((1+8*n))) ** Decimal(0.5)
m1 = math.floor(f1)
m2 = math.ceil(f1)

if m1 == m2:
    print("YES")
    print((-1+m1)//2)
else:
    print("NO")