每日一题 2240. 买钢笔和铅笔的方案数

难度：中等

枚举就行

class Solution:
    def waysToBuyPensPencils(self, total: int, cost1: int, cost2: int) -> int:
        res = 0
        for i in range(total//cost1 + 1):
            res += (total - i * cost1) // cost2
            res += 1
        return res