package q1716

func totalMoney(n int) int {
	if n <= 7 {
		return (1 + n) * n / 2
	}
	base := 28

	rem := n % 7
	fullWeeks := n / 7
	moneyFW := (base-7)*fullWeeks + 7*(1+fullWeeks)*fullWeeks/2
	moneyRem := (1+rem)*rem/2 + rem*fullWeeks
	return moneyFW + moneyRem
}

var _ = totalMoney