#include <iostream>

using namespace std;

int main (){

int c,k,i,d,a,br,j;

cin >> c;
cin >> k;

a=c;

for ( i=0; i<k; i++ ){

    br=1;

    for ( j=0; j<i; j++ ){

        br=br*10;

        }

d=c % 10;

if ( d<5 ) c=c-d;
if ( d>4 ) c=c+10-d;

if ( d<5 ) a=a-d*br;
if ( d>4 ) a=a+(10-d)*br;

c=c/10;

}

cout << a << endl;

//system ("pause");
return 0;

}