题解 | #鸡兔同笼#

while True:
    try:
        n = int(input())
        sum = 0
        i, j = 0, 0
        min, max = 0, 0
        while True:  # 对鸡贪心
            if sum == n:
                max = i
                break
            elif sum > n:
                max, min = 0, 0
                break
            sum += 2
            i += 1
        sum = 0
        while True:  # 对兔贪心
            if sum == n or sum - n == 2:
                min = j
                break
            elif sum > n and sum - n != 2:
                min, max = 0, 0
                break
            sum += 4
            j += 1
        print(min, end=" ")
        print(max)
    except:
        break