f579. 1. 購物車 -- 2020年7月APCS | From: [106.107.218.192] | 發表日期 : 2024-12-02 21:52

people_num = 0
a, b = map(int, input().split())
n = int(input())
for i in range(n):
    total = []
    total_min = []
    somethings = list(map(int, input().split()))
    some_long = len(somethings)
    for h in range(some_long):
        if somethings[h] == a:
            total.append(somethings[h])
        if somethings[h] == b:
            total.append(somethings[h])
        if somethings[h] == -a:
            total_min.append(somethings[h])
        if somethings[h] == -b:
            total_min.append(somethings[h])
    total_min_long = len(total_min)
    for j in range(total_min_long):
        s = 0
        k = 0
        while s != 1:
            if total_min[j] == total[k] * -1:
                total[k] = 0
                s += 1
            k += 1
    end_long = len(total)
    num = 0
    for f in range(end_long):
        if total[f] == a:
            num += 1
            for s in range(end_long):
                if total[s] == a:
                    total[s] = 0
        if total[f] == b:
            num += 1
            for s in range(end_long):
                if total[s] == b:
                    total[s] = 0
    if num == 2:
        people_num += 1
print(people_num)