paste bin

#include <cstdio>

int main(void)
{
    int x,y;
    int r[3],i;
    scanf("%d%d",&x,&y);
    r[0]=y;
    r[1]=y;
    r[2]=y;
    i=0;
    while (1)
    {
        if(r[0]>=x && r[1]>=x && r[2]>=x)
        {
            printf("%d\n",i);
            break;
        }
        i+=1;
        
        r[i%3] = r[(i+1)%3] + r[(i+2)%3] - 1;
    }
    return 0;
}