JuniorMath
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 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.
Example 1
Input
n = 4Output
10After the 4^th day, the total is 1 + 2 + 3 + 4 = 10.
Example 2
Input
n = 10Output
37After the 10^th day, the total is (1 + 2 + 3 + 4 + 5 + 6 + 7) + (2 + 3 + 4) = 37, and on the 2^nd Monday, Hercy only puts in $2.
Constraints
- 1 <= n <= 1000