/* Solution to inchworm  by Bob Roos */
#include <stdio.h>

int main() {
  int n,u,d,clk,position;

  while (scanf("%d %d %d",&n, &u, &d) && n > 0) {
    clk = 0;
    position = 0;
    while (position < n) {
      clk++;
      position += u;
      if (position >= n) break;
      clk++;
      position -= d;
    }
    printf("%d\n",clk);
  }
  return 0;
}