基础练习 数列特征

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import java.util.Scanner;

public class Main {
    static int max(int[]a){
        int n = -10000;
        for(int x : a){
            if(x>n) n=x;
        }
        return n;
    }
    static int min(int[]a){
        int n = 10000;
        for(int x : a){
            if(x<n) n=x;
        }
        return n;
    }
    static double sum(int[]a){
        double n = 0;
        for(int x : a){
            n+=x;
        }
        return n;
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int r = sc.nextInt();
        int[] a = new int[r];
        for(int i = 0; i < r; i++){
            a[i]=sc.nextInt();
        }
        System.out.println(max(a));
        System.out.println(min(a));
        String s = Double.toString(sum(a));
        if(s.indexOf(".") > 0){
            //正则表达
            s = s.replaceAll("0+?$", "");//去掉后面无用的零
            s = s.replaceAll("[.]$", "");//如小数点后面全是零则去掉小数点
        }
        System.out.println(s);
    }
}