#スペース区切りの整数の入力
A, B, C = map(int, input().split())

A = float(A)
B = float(B)
C = float(C)


A_sq = pow(A, 0.5)
B_sq = pow(B, 0.5)
C_sq = pow(C, 0.5)

if(A_sq+B_sq < C_sq):
  print("Yes")
else:
  print("No")


