# coding: utf-8

inp = int(input())

for div in range(3,200):
    mid = inp // div
    min = mid - div
    max = mid + div
    for lp in range(min,max):
        result = 0
        calc = []
        for lp2 in range(lp,lp+div):
            calc.append(lp2)
            result += lp2
        if(result == inp):
            print("YES")
            exit()

print("NO")