1494
#include<stdio.h>
int main(int argc, char* argv[])
{
int i,j,k,a,b,c;
scanf("%d %d %d",&a,&b,&c);
while (a>0 && b>0 && c>0){
c=b-c;
if (a<=b) printf("1\n");else{
i=(a-b)/c;
if (i*c!=a-b) i++;
printf("%d\n",i*2+1);
}
scanf("%d %d %d",&a,&b,&c);
}
return 0;
} |