## @error36

Serial_list = input().split(" ")

a = Serial_list[0]
b = Serial_list[1]
ans = 0

for i in range(int(input())):
    # 建立統計清單
    total_dic = {}
    total_dic[a] = 0
    total_dic[b] = 0
    
    # 輸入資料
    PurchaseRecord = input().split(" ")
    for d in PurchaseRecord:
        # 建立條目
        number = int(d)
        key = str(abs(number))
        if key not in total_dic.keys():
            total_dic[key] = 0

        # 新增條目資訊
        if number > 0:
            total_dic[key] += 1
        
        elif number < 0:
            total_dic[key] += -1

        # 搜索並統計
    if total_dic[a] > 0 and total_dic[b] > 0:
        ans += 1

print(ans)