n = int(input())

left = 0
right = n + 1

while right - left > 1:
    mid = (right + left) // 2
    if mid * (mid + 1) <= 2 * n:
        left = mid
    else:
        right = mid

if left * left + left - 2 * n == 0:
    print("YES")
    print(left)
else:
    print("NO")