import sys
input = lambda: sys.stdin.readline().rstrip()

from fractions import Fraction

def main():
    # 入力
    a = int(input())
    b = int(input())
    c = int(input())
    # 計算・出力
    for BD in range(1, b+c+1):
        for EC in range(1, b+c+1):
            BC = BD + a + EC
            if b + c > BC and BC + b > c and c + BC > b:
                # cosB = - (c**2 - BC**2 - b**2) / (2*b*BC)
                # AD = sqrt(BD**2 + b**2 - 2*BD*b*cosB)
                # cosBAD = (BD**2 - b**2 - AD**2) / (2*b*AD)
                cosB = Fraction(-(c**2 - BC**2 - b**2), (2*b*BC))
                AD2 = (BD**2 + b**2 - 2*BD*b*cosB)
                cos2BAD = (BD**2 - b**2 - AD2)**2 / (4*b*b*AD2)

                # cosC = - (b**2 - BC**2 - c**2) / (2*c*BC)
                # AE = sqrt(EC**2 + c**2 - 2*EC*c*cosC)
                # cosEAC = (EC**2 - c**2 - AE**2) / (2*c*AE)
                cosC = Fraction(- (b**2 - BC**2 - c**2), (2*c*BC))
                AE2 = (EC**2 + c**2 - 2*EC*c*cosC)
                cos2EAC = (EC**2 - c**2 - AE2)**2 / (4*c*c*AE2)

                if cos2BAD == cos2EAC:
                    print('Yes')
                    return
    print('No')

if __name__ == "__main__":
    main()