#include <stdio.h>
#include <math.h>

int main(void)
{
  int n, u, d;

  while (scanf("%d %d %d", &n, &u, &d) == 3 && n) {
    printf("%d\n", (int)ceil((double)(n - u) / (u - d))*2 + 1);
  }
  return 0;
}