calculate_money_bank.py (949B)
| # 1716. Calculate Money in Leetcode Bank
"""
hercy wants to save money for his first car. he puts money in the leetcode
bank every day. he starts by putting in $1 on monday, the first day. every
day from tuesday to sunday he will put in 1 more dollar than the day before.
on every subsequent monday, he will put in 1 more than the previous monday.
given 'n', return the total amount of money he will have in the leetcode bank
at the end of the n'th day.
"""
class Solution(object):
def prog(self, next, prev, terms):
return (next + prev) * terms // 2
def totalMoney(self, n):
"""
:type n: int
:rtype: int
"""
q, r = divmod(n, 7)
return self.prog(28, 28 + (q - 1) * 7, q) + self.prog(q + 1, q + r, r)
if __name__ == "__main__":
obj = Solution()
print(obj.totalMoney(4)) # expect: 10
print(obj.totalMoney(10)) # expect: 37
print(obj.totalMoney(20)) # expect: 96
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