绝对值函数求极值

绝对值函数求极值，模拟即可：

import java.util.*;
public class Main {
    public static void main(String[] args) throws Exception{
        Scanner sc = new Scanner(System.in);
        int[] v = new int[4];
        for(int i = 0; i < 4; ++i) v[i] = sc.nextInt();
        Arrays.sort(v);
        int r = Integer.MAX_VALUE;
        for(int i = v[0]; i <= v[3]; ++i){
            int sum = 0;
            for(int j = 0; j <= 3; ++j){
                sum += Math.abs(v[j] - i);
            }
            if(r > sum) r = sum;
        }
        System.out.println(r);
    }
}