(A) Wrong Subtraction.java

import java.util.Scanner;
import java.util.stream.IntStream;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
        int n=sc.nextInt();
        int k=sc.nextInt();
        for(int i=0;i<k;i++){
            if(n%10==0){
                n=n/10;
            }
            else
                n=n-1;
        }
        System.out.println(n);
	}
}