import math

from typing import List


def main():
    nums = [int(n) for n in input().split(' ')]

    if si(nums):
        print('Yes')
    else:
        print('No')


def si(nums: List[int]) -> bool:
    result = False
    a, b, c = nums
    a *= 10 ** 9
    b *= 10 ** 9
    c *= 10 ** 9

    if int(math.sqrt(a)) + int(math.sqrt(b)) < int(math.sqrt(c)):
        result = True

    return result


if __name__ == '__main__':
    main()
