#include <iostream>
#include <cmath>
#include <cstdlib>
using namespace std;
int main(void){
//int a,b,y,j;
	int h;
double a,b,y,j,z;
double cijeli,dec;
cin>>a>>b;
if(b==1){
	y=10;}
if(b==2){
	y=100;}
if(b==3){
	y=1000;}
if(b==4){
	y=10000;}
if(b==5){
	y=100000;}
if(b==6){
	y=1000000;}
if(b==7){
	y=10000000;}
if(b==8){
	y=100000000;}
if(b==9){
	y=1000000000;}
z=(a/y);
h=(a/y);
j=h*y;

dec = modf (z, &cijeli);

if(dec<0.5){
 printf("%.0lf\n",j);//cout<<j<<endl;
}

else  printf("%.0lf\n",j+y);//cout<<j+y<<endl;

return 0;
}