【題解】ZeroJudge c079: 10346 – Peter’s Smokes

#include <iostream>
using namespace std;

int main() {
    int n, k;
    while (cin >> n >> k){
        int sum = n + n / k;
        n = n / k + n % k;
        while (n >= k){
            n -= k;
            n++;
            sum++;
        }
        cout << sum << "\n";
    }
    return 0;
}

while True:
    try:
        n, k = map(int, input().split())
        ans = n + n // k
        n = n // k + n % k;
        while n >= k:
            n -= k
            n += 1
            ans += 1
        print(ans)
    except:
        break

while True:
    try:
         n, k = map(int, input().split())
         print(n + n // k + (n // k + n % k) // k)
    except:
        break