CCF 201912-2 Python

n = int(input())
l = []
add = [0]*5  # 评分为0,1,2,3,4的个数
for i in range(n):
    (x, y) = map(int, input().split())
    l.append((x,y))
for (x,y) in l:
    if (x + 1, y) in l and (x - 1, y) in l and (x, y + 1) in l and (x, y - 1) in l:
        score = 0
        if (x + 1, y + 1) in l:
            score += 1
        if (x + 1, y - 1) in l:
            score += 1
        if (x - 1, y + 1) in l:
            score += 1
        if (x - 1, y - 1) in l:
            score += 1
        add[score] += 1
for x in add:
    print(x)