import sys
import collections

sys.setrecursionlimit(10 ** 8)

input = sys.stdin.readline


def main():
    N = int(input())
    A = [int(x) for x in input().split()]
    B = [x % 10 for x in A]

    B.sort()

    c = collections.Counter(B)

    total = sum(B) % 10

    if total == 0:
        print(N)
    else:
        ans = float("inf")
        for one in range(min(c[1] + 1, 10)):
            for two in range(min(c[2] + 1, 5)):
                for three in range(min(c[3] + 1, 10)):
                    for four in range(min(c[4] + 1, 5)):
                        for five in range(min(c[5] + 1, 2)):
                            for six in range(min(c[6] + 1, 5)):
                                for seven in range(min(c[7] + 1, 10)):
                                    for eight in range(min(c[8] + 1, 5)):
                                        for nine in range(min(c[9] + 1, 10)):
                                            if (one + two * 2 + three * 3 + four * 4 + five * 5 + six * 6 + seven * 7 + eight * 8 + nine * 9) % 10 == total:
                                                ans = min(ans, one + two + three + four + five + six + seven + eight + nine)

        print(N - ans)


    
    

if __name__ == '__main__':
    main()