17-12-01(最小差值)

import java.util.*;
public class csp_17_12_01 {
    
    
public static void main(String[] args) {
    
    
	Scanner in = new Scanner(System.in);
	int n = in.nextInt();
	int[] a = new int[n];
	for(int i =0;i<n;i++) {
    
    
		a[i] = in.nextInt();
	}
	int min = 10000 ;
	for(int i =0;i<n-1;i++) {
    
    
		for(int j =i+1;j<n;j++) {
    
    
			int t = Math.abs(a[i]-a[j]);
			
			if(min > t)
				min = t;
		}
	}
	System.out.print(min);
}
}
//5
//1 5 4 8 20


//5
//9 3 6 1 3