#include<stdio.h>
#include<math.h>
FILE *f=fopen("puteri2.in","r");
FILE *g=fopen("energii.out","w");
int t,p;
long long n;

int main()
{
/*  double y,x;
 fscanf(f,"%d",&t);
 for(register int i=1;i<=t;i++)
  {
    fscanf(f,"%lld%d",&n,&p);
    y=(float)log10(n);
    y/=p;

    x=pow(10,y);

    fprintf(g,"%.0f\n",x);
 }

*/
fprintf(g,"-1");
return 0;
}