class Solution(object):
    def totalMoney(self, n):
        week, day = 1, 1
        res = 0
        for i in range(n):
            res += week + day - 1
            day += 1
            if day == 8:
                day = 1
                week += 1
        return res

1.直接一个for循环n次，计算一周能存多少钱，如果天数等于8就相当于下周一，把天数置位，在上周一的基础上加1继续循环