from math import sqrt
from decimal import *

def main():
  A,B,C =   map(int, input().split())

  getcontext().prec = 20
  
  a = int(Decimal(A).sqrt())
  b = int(Decimal(B).sqrt())
  c = int(Decimal(C).sqrt())

  if a + b < c:
    print('Yes')
  else:
    print('No')

if __name__ == "__main__":
  main()