5 3
 1000 3
 777 17
 4 3
 2 2
 100 4
 10 4
 999 2
 6 4
 1 2
 17 3
 1 4
 26 8
 91 5
 1 3
 1000 2
 20 3
 9 4
 123 5
 1000 1000
 3 2
 3 3
 80 970
 1000 4
 1 1000

7
 1499
 825
 5
 3
 133
 13
 1997
 7
 1
 25
 1
 29
 113
 1
 1999
 29
 11
 153
 1001
 5
 4
 80
 1333
 1

#include <bits/stdc++.h>
int main() {
  int a, b, total, x, y, k = 0;
  scanf("%d%d", &a, &b);
  x = a / b;
  total = x + a;
  if (x == b) {
    printf("%d", total + 1);
    return 0;
  }
  if (x > b) {
  poi:
    y = x % b;
    x = x / b;
    total = total + x;
    if (x + y > b) {
      x = x + y;
      k++;
      goto poi;
    } else if (x + y == b) {
      printf("%d", total + 1);
      return 0;
    } else if (k > 0) {
      printf("%d", total + 1);
      return 0;
    }
  } else {
    printf("%d", total + 1);
    return 0;
  }
  return 0;
}
