import java.util.*;
 
class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = 0, max = 0;
    for(int i=0; i<n; i++){
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    }
    System.out.println(max - min);

    sc.close();
  }
} import java.util.*; util.* java class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = 0, max = 0;
    for(int i=0; i<n; i++){
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    }
    System.out.println(max - min);

    sc.close();
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = 0, max = 0;
    for(int i=0; i<n; i++){
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    }
    System.out.println(max - min);

    sc.close();
  } main {
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = 0, max = 0;
    for(int i=0; i<n; i++){
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    }
    System.out.println(max - min);

    sc.close();
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int[] a = new int[n]; a new int[n] n int min = 0 min 0 max = 0; max 0 for(int i=0; i<n; i++){
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    } int i=0; int i=0; i 0 i<n i n i++ i++ i {
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    } {
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    } if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      } i==0 i 0 {
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc min = a[i] min a[i] a i max = a[i] max a[i] a i {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        } min > a[i] min a[i] a i {
          min = a[i];
        } min = a[i] min a[i] a i if(max < a[i]){
          max = a[i];
        } max < a[i] max a[i] a i {
          max = a[i];
        } max = a[i] max a[i] a i System.out.println(max - min) System.out.println System.out System System.out max - min max min sc.close() sc.close sc String[] args args
import java.util.*;
 
class Main{
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    
    int n = sc.nextInt();
    int[] a = new int[n];
    int min = 0, max = 0;
    for(int i=0; i<n; i++){
      if(i==0){
        a[i] = sc.nextInt();
        min = a[i];
        max = a[i];
      } else {
        a[i] = sc.nextInt();
        if(min > a[i]){
          min = a[i];
        } else if(max < a[i]){
          max = a[i];
        }
      }
    }
    System.out.println(max - min);

    sc.close();
  }
}
