import math

# S = input()
# N, M = map(int, input().split())
# As = [int(input()) for _ in range(N)]
# nums = list(map(int, input().split()))
# nums_2d = [list(map(int, input().split())) for _ in range(N)]


def main():
    print(solve())


def solve():
    a, b, c = map(int, input().split())

    ra = math.sqrt(a)
    rb = math.sqrt(b)

    return ['No', 'Yes'][a + b + 2 * ra * rb < c]


if __name__ == '__main__':
    main()
