de,ab,ac = int(input()),int(input()),int(input())
f = False
for bd in range(1,ab+ac-de):
    for ec in range(1,ab+ac-de-bd):
        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)**0.5
        ae = (ac*ac+ec*ec-(ac*ac+bc*bc-ab*ab)*ec/bc)**0.5
        if abs((ab*ab+ad*ad-bd*bd)*ac*ae-(ac*ac+ae*ae-ec*ec)*ab*ad)<1e-5: f = True
print("Yes" if f else "No")