package 校赛2021;

import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class Main {
    public static void main(String[] args) {
        // std input
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] arr = new int[n];
        for (int i = 0; i < n; i++) {
            arr[i] = in.nextInt();
        }
        // record the prime factor of those nums
        Set<Integer> primeFactor = new HashSet<>();
        for (int i = 0; i < n; i++) {
            int temp = arr[i];
            for (int j = 2; j * j <= temp; j++) {
                if (temp % j == 0) {
                    primeFactor.add(j);
                    temp /= j;
                }
            }
            if (temp > 1)
                primeFactor.add(temp);
        }
        // choose the max choice
        int ans = 0;
        for (var factor : primeFactor) {
            int temp = 0;
            for (int i = 0; i < n; i++) {
                if (arr[i] % factor == 0)
                    temp += arr[i];
            }
            ans = (temp > ans) ? temp : ans;
        }
        System.out.println(ans);
        in.close();
    }
}

Can't open /dev/null: No such file or directory
Main.java:1: error: unmappable character (0xE6) for encoding US-ASCII
package ??????2021;
        ^
Main.java:1: error: unmappable character (0xA0) for encoding US-ASCII
package ??????2021;
         ^
Main.java:1: error: unmappable character (0xA1) for encoding US-ASCII
package ??????2021;
          ^
Main.java:1: error: unmappable character (0xE8) for encoding US-ASCII
package ??????2021;
           ^
Main.java:1: error: unmappable character (0xB5) for encoding US-ASCII
package ??????2021;
            ^
Main.java:1: error: unmappable character (0x9B) for encoding US-ASCII
package ??????2021;
             ^
6 errors