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 {
  
      // Complete the minimumLoss function below.
      static int minimumLoss(long[] price) {
          
          long min = Long.MAX_VALUE;
          //Hash mapping for easy access to indexes
          Map<Long, Integer> a = new HashMap<Long, Integer>();
          for (int index = 0; index < price.length; index++)
          {
              a.put(price[index], index);
          }
          //Sorting the original array
          Arrays.sort(price);
          for(int i=1;i<price.length;i++){
              //taking difference of the current element and the previous element
              long diff = price[i]-price[i-1];
              
              //if the difference is possitive and
              //if the previous index is greater than current index (from the Map a)
              if(a.get(price[i])<a.get(price[i-1]) && diff>0){
                  min = Math.min(min, diff);
              }
          }
          return (int)min; //typecasting from long to int
      }
      
  
      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])?");
  
          long[] price = new long[n];
  
          String[] priceItems = scanner.nextLine().split(" ");
          scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
  
          for (int i = 0; i < n; i++) {
              long priceItem = Long.parseLong(priceItems[i]);
              price[i] = priceItem;
          }
  
          int result = minimumLoss(price);
  
          bufferedWriter.write(String.valueOf(result));
          bufferedWriter.newLine();
  
          bufferedWriter.close();
  
          scanner.close();
      }
  }
  