Edit distance

import java.util.*;
import java.io.*;
public class Task2
{
  public static void main(String[] args)   throws IOException 
  {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); 
    String line1 = reader.readLine();
    String line2 = reader.readLine();
    char[] l1 = line1.toCharArray();
    char[] l2 = line2.toCharArray();
    int[][] matrix = new int[l1.length+1][l2.length+1];
    int tmp;
    //initialize matrix
    for (int i = 0; i < l1.length+1 ;i++ ) {
      matrix[i][0] = i;
    } // end of for
    for (int i = 0; i < l2.length+1 ; i++ )
    {
      matrix[0][i] = i;
    } // end of for
    for (int i =  1; i < l1.length+1 ; i++ )
    {
      for (int j = 1; j < l2.length+1; j++ ) 
      {
        if (i > 0 && j > 0)
          tmp = (l1[i-1]==l2[j-1])? 0:1;
        else
          tmp = 0;  
         matrix[i][j] = min(matrix[i][j-1]+1, matrix[i-1][j]+1, matrix[i-1][j-1]+tmp);
      } 
    }
    System.out.print(matrix[l1.length][l2.length]);
  }
    public static int max(int a, int b)
    {
    return a < b?b:a;
    }
    
    public static int min(int a, int b, int c)
    {
    int result = a<b?a:b;
    result = result<c?result:c;
    return result;
    }
    
  }

Test 1

Verdict: UNKNOWN

Test 2

Verdict: UNKNOWN

Test 3

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Test 4

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Test 5

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Test 6

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Test 7

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Test 8

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Test 9

Verdict: UNKNOWN

Test 10

Verdict: UNKNOWN

Test 11

Verdict: UNKNOWN

Test 12

Verdict: UNKNOWN

Test 13

Verdict: UNKNOWN

Test 14

Verdict: UNKNOWN

Test 15

Verdict: UNKNOWN

Test 16

Verdict: UNKNOWN

Test 17

Verdict: UNKNOWN

Test 18

Verdict: UNKNOWN

Test 19

Verdict: UNKNOWN