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