题解 | 单组_一维数组

import java.io.*;
import java .util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        File file = new File("1.txt");
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int[] arrInt = new int[n];
        long m = 0;
        for(int i = 0; i < n; i++){
            arrInt[i] = scanner.nextInt();
            m += arrInt[i];
        }
        System.out.println(m);
    }
}

注意最后和为long型。