#include <stdio.h>
int main()
{	int a,b;
	scanf("%d%d",&a,&b);
	if (b==1)
	{
		if (a%10>4)
		{printf("%d",a/10*10+10);
		}
		else
		if (a%10<4)
		printf("%d",a/10*10);
		if(a%10==4)
		printf("180");
	}
	if (b==2)
	{
		if (((a%100))>49)
		{printf("%d",a/100*100+100);
		}
		else
		if (((a%100))<49)
		printf("%d",a/100*100);
	}
	if (b==3)
	{
		if (((a%1000))>499)
		{printf("%d",a/1000*1000+1000);
		}
		else
		if (((a%1000))<499)
		printf("%d",a/1000*1000);
	}
	if (b==4)
	{
		if (((a%10000))>4999)
		{printf("%d",a/10000*10000+10000);
		}
		else
		if (((a%10000))<4999)
		printf("%d",a/10000*10000);
	}
	if (b==5)
	{
		if (((a%100000))>49999)
		{printf("%d",a/100000*100000+100000);
		}
		else
		if (((a%100000))<49999)
		printf("%d",a/100000*100000);
	}
	if (b==6)
	{
		if (((a%1000000))>499999)
		{printf("%d",a/1000000*1000000+1000000);
		}
		else
		if (((a%1000000))<499999)
		printf("%d",a/10*10);
	}
	if (b==7)
	{
		if (((a%10000000))>4999999)
		{printf("%d",a/10000000*10000000+10000000);
		}
		else
		if (((a%10000000))<4999999)
		printf("%d",a/10*10);
	}
	if (b==8)
	{
		if (((a%100000000))>49999999)
		{printf("%d",a/100000000*100000000+100000000);
		}
		else
		if (((a%100000000))<49999999)
		printf("%d",a/10*10);
	}
	if (b==9)
	{
		if (((a%1000000000))>499999999)
		{printf("%d",a/1000000000*1000000000+1000000000);
		}
		else
		if (((a%1000000000))<499999999)
		printf("%d",a/1000000000*1000000000);
	}
return 0;
}