优化前后的两个数

运行下面这段程序，填写它打印出来的结果。

BLK = 4
LINES = 4

def sim(addrs, ways=1):
    sets = LINES // ways
    tags = [[None] * ways for _ in range(sets)]
    order = [[] for _ in range(sets)]
    hit = 0
    miss = 0
    for a in addrs:
        b = a // BLK
        s = b % sets
        if b in tags[s]:
            hit = hit + 1
            order[s].remove(b)
            order[s].append(b)
        else:
            miss = miss + 1
            if None in tags[s]:
                tags[s][tags[s].index(None)] = b
            else:
                old = order[s].pop(0)
                tags[s][tags[s].index(old)] = b
            order[s].append(b)
    return hit, miss

before = sim(list(range(32)) * 2)
after = sim(list(range(16)) * 2 + list(range(16, 32)) * 2)
print(str(before[1]) + "/" + str(after[1]) + "/"
      + str(before[1] // after[1]))