X, Y, Z = [int(x) for x in input().split()]
A, B, C = 100 + X, 100 + Y, 100 + Z
"""
while 1:
    # print(f"A: {A}, B:{B}, C:{C}")
    if A == B == C:
        print("Yes")
        break
    elif A < 0 or B < 0 or C < 0:
        print("No")
        break

    A += 1
    B -= 1

    if A == B == C:
        print("Yes")
        break
    elif A < 0 or B < 0 or C < 0:
        print("No")
        break

    B += 2
    C -= 2

    if A == B == C:
        print("Yes")
        break
    elif A < 0 or B < 0 or C < 0:
        print("No")
        break

    C += 3
    A -= 3

    if A == B == C:
        print("Yes")
        break
    elif A < 0 or B < 0 or C < 0:
        print("No")
        break
"""
sum_data = A + B + C
if sum_data % 3 == 0:
    print("Yes")
else:
    print("No")