import math

n = int(input())
a = math.sqrt(1 + 8 * n)
a = round(a)
if(a*a == 1 + 8 * n):
    x = (-1 + a) / 2
    if(x.is_integer()):
        print("YES")
        print(round(x))
    else:
        print("NO")
else:
    print("NO")