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
        ad = (ab**2+bd**2-bd*(ab**2+bc**2-ac**2)/bc)**0.5
        ae = (ac**2+ec**2-ec*(ac**2+bc**2-ab**2)/bc)**0.5
        if (ab**2+ad**2-bd**2)/ab/ad==(ac**2+ae**2-ec**2)/ac/ae: f = True
print("Yes" if f else "No")