Early payment discount
A vendor rewards early payment: the further ahead the payment, the larger the discount off the subtotal.
- Days early >= 10 earns a 2% discount, rounded down.
- Days early >= 5 (but under 10) earns a 1% discount, rounded down.
- Under 5 days earns no discount.
- The discount is floor(subtotal × percentage / 100).
EarlyDiscount(subtotal: int, daysEarly: int) → int
C# needs a compiler and Drill does not host one yet, so this page is the reference rather than an exercise: the problem, worked examples, and the solution in full. To type it out, the same problem runs in Python.
Where you start
public int EarlyDiscount(int subtotal, int daysEarly) {
}Worked examples
| Call | Result |
|---|---|
EarlyDiscount(10000, 10) | 200 |
EarlyDiscount(5000, 5) | 50 |
EarlyDiscount(7500, 15) | 150 |
EarlyDiscount(999, 3) | 0 |
Hint
Check the thresholds from largest to smallest.
Reference solution in C#
public int EarlyDiscount(int subtotal, int daysEarly) {
if (daysEarly >= 10) return subtotal * 2 / 100;
if (daysEarly >= 5) return subtotal / 100;
return 0;
}