#include<stdio.h>
#include<math.h>
#include<string.h>

int main(void)
{
  int s,a,b,d,k,l=1,i,j,c;
  scanf("%d %d",&c,&k);
  while(k!=0){
    l=l*10;
    k--;
  }
  
 
  int x,y;
  x=c/l;
  y=c%l;
  
  int o;
  if(y>=5)o=1;
  else o=0;
  
  printf("%d\n",(x+o)*l);
  
  
  
}