Leetcode Go Calculate Money in Leetcode Bank

Calculate Money in Leetcode Bank - LeetCode
https://leetcode.com/problems/calculate-money-in-leetcode-bank/

• Go 言語で取り組んだメモ

回答

O(1) Time Math solution - Calculate Money in Leetcode Bank - LeetCode
https://leetcode.com/problems/calculate-money-in-leetcode-bank/solutions/2501610/o-1-time-math-solution/

func totalMoney(n int) int {
    w := n/7
    d := n%7
    res:=7*((w-1)*w)/2+28*w+(d+d*d)/2+w*d
    return res
}