UVA 12791 - Lap

#include <cstdio>

int main()
{
  int X, Y;
  while (scanf("%d %d", &X, &Y) != EOF) {
    int d = Y - X;
    int lap = Y / d;
    if (Y % d)
      lap++;
    printf("%d\n", lap);
  }
  return 0;
}