from decimal import Decimal
de,ab,ac = Decimal(input()),Decimal(input()),Decimal(input())
f = False
for bd in range(1,int(ab+ac-de)):
    for ec in range(1,int(ab+ac-de)-bd):
        bd = Decimal(bd); ec = Decimal(ec); bc = bd+de+ec
        if ab+bc<=ac or ac+bc<=ab: continue
        ad = (ab*ab+bd*bd-(ab*ab+bc*bc-ac*ac)*bd/bc)**Decimal("0.5")
        ae = (ac*ac+ec*ec-(ac*ac+bc*bc-ab*ab)*ec/bc)**Decimal("0.5")
        if (ab*ab+ad*ad-bd*bd)*ac*ae==(ac*ac+ae*ae-ec*ec)*ab*ad: f = True
print("Yes" if f else "No")