Value pair analysis, Java

Value pair analysis

//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

//Value pair analysis

import java.util.*;
import java.lang.*;
import java.io.*;

class Rextester{  
    
    public static void main(String args[]){
        Scanner rd = new Scanner(System.in);
        int utr = rd.nextInt();
        int[] arr = new int[utr];
        
        for (int i = 0; i < utr; i++){
            arr[i] = -rd.nextInt()+rd.nextInt();
        }
        
        int max = 0;
        int rep;
        int lst = 0;
        
        for (int i = 0; i < utr; i++){
            rep = 0;
            for (int s = 0; s < utr; s++){
                if (arr[i] == arr[s]){
                    rep ++;
                }
            }
            if (rep > lst){
                max = arr[i];
                lst = rep;
            }else if (rep == lst){
                max = Math.max(arr[i], max);
            }
        }
        
        System.out.println(max);
    }
    
}
/*
Input:
7
10 58
15 315
20 408
100 1000
32 63
32 63
11 121

Output:
31
*/


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