999 dan katta butun son n berilgan. Uning yuzliklar raqamini toping. Faqat bitta butun bo'lish va bitta qoldiq olish amalidan foydalaning (12345 → 3).
func hundredsDigit(n int) int {
// ...
}
Input: n=12345
Output: 3
Input: n=98765
Output: 7
Input: n=1000
Output: 0
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