#include<stdio.h>
double i,j,p,q,per;
int main()
{
      scanf("%lf %lf",&p,&q);

      for (i=1;;i++)
          for (j=0;j<=i;j++)
          {
              per=100*j/i;
              if (p<per && per<q)
              {
                 printf("%d",(int) i);
                 scanf(" ");
                 return 0;
              }
          }
}