#include<iostream.h>
#include<fstream.h>
#include<string.h>
long long d,k=1,i,o=0,z=0;
char a[1000000],b;
int g;
int main()
{ifstream f("next.in");
ofstream h("next.out");
f.getline(a,1000000);
f>>d;
while(d/10!=0)
{d=d/10;
k++;}
for(i=z;i<=z+k;i++)
{b=a[i];
	g=atoi(&b);
o=o*10+g;}

/*if(o<d)
	{b=a[i];
	g=atoi(&b);
o=o*10+g;}*/
cout<<o;


/*
if(n%d==0)
	h<<n;
else
{c=n/d;
m=c*d;
while(m<n)
m=m+d;}
h<<m;*/


	
	return 0;}