import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time

sys.setrecursionlimit(10**7)
inf = 10**20
mod = 10**9 + 7

def LI(): return list(map(int, input().split()))
def II(): return int(input())
def S(): return input()


def main():
    a = LI()
    if sum(a) % 3 == 0:
        return 'YES'
    return 'NO'


print(main())
