import sys
import numpy as np


def main():
    a, b, c = map(int, input().split())
    if c <= b or c <= a:
        print("No")
        sys.exit(0)

    left = a + b
    right = c - 2*np.sqrt(a*b)
    if left < right:
        print("Yes")
    else:
        print("No")


if __name__ == "__main__":
    main()
