content: import java.io.*;
  import java.math.*;
  import java.security.*;
  import java.text.*;
  import java.util.*;
  import java.util.concurrent.*;
  import java.util.regex.*;
  
  public class Solution {
  
    
      static int minimumAbsoluteDifference(int[] arr) {
          //n-stores length of array,diff is used to take out difference
          int i,j,diff,n=arr.length; 
          //taking a base minimum value for reference
          int min=(int)Math.abs(arr[0]-arr[1]);
          for(i=0;i<n;i++)
          {
              for(j=i+1;j<n;j++)
              {
                  //Math.abs takes out the absolute value and returns in double so we type cast it in int
                  diff=(int)Math.abs(arr[i]-arr[j]);
                  //if the diffrence is less than min it becomes the minimum value
                  if(diff<min)
                  min=diff;
              }
          }
      //returning the minimum value
       return(min);
      }
  
      private static final Scanner scanner = new Scanner(System.in);
  
      public static void main(String[] args) throws IOException {
          BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
  
          int n = scanner.nextInt();
          scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
  
          int[] arr = new int[n];
  
          String[] arrItems = scanner.nextLine().split(" ");
          scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
      //printing element in array
          for (int i = 0; i < n; i++) {
              int arrItem = Integer.parseInt(arrItems[i]);
              arr[i] = arrItem;
          }
      //getting result from function
          int result = minimumAbsoluteDifference(arr);
  
          bufferedWriter.write(String.valueOf(result));
          bufferedWriter.newLine();
  
          bufferedWriter.close();
  
          scanner.close();
      }
  }
  