import java.util.*;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int []a = new int[N];
		for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	}
} import java.util.*; util.* java public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int []a = new int[N];
		for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int []a = new int[N];
		for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int []a = new int[N];
		for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	} 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 for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		} int i =0; int i =0; i 0 i<N i N i++ i++ i {
			a[i] = sc.nextInt();
		} {
			a[i] = sc.nextInt();
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc int max=a[0]; max a[0] a 0 int min=a[0]; min a[0] a 0 for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		} int i=1; int i=1; i 1 i<N i N i++ i++ i {
			if(max<a[i]) {
				max=a[i];
			}
		} {
			if(max<a[i]) {
				max=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 for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		} int i=1; int i=1; i 1 i<N i N i++ i++ i {
			if(min>a[i]) {
				min=a[i];
			}
		} {
			if(min>a[i]) {
				min=a[i];
			}
		} if(min>a[i]) {
				min=a[i];
			} min>a[i] min a[i] a i {
				min=a[i];
			} min=a[i] min a[i] a i int ans = max-min; ans max-min max min System.out.println(Math.abs(ans)) System.out.println System.out System System.out Math.abs(ans) Math.abs Math ans String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int []a = new int[N];
		for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int []a = new int[N];
		for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	}
} Main
import java.util.*;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int []a = new int[N];
		for(int i =0;i<N;i++) {
			a[i] = sc.nextInt();
		}
		int max=a[0];
		int min=a[0];
		for(int i=1;i<N;i++) {
			if(max<a[i]) {
				max=a[i];
			}
		}
		for(int i=1;i<N;i++) {
			if(min>a[i]) {
				min=a[i];
			}
		}
		int ans = max-min;
      System.out.println(Math.abs(ans));
	}
}
