1056 组合数的和 (15 分)

题目要求：

代码：

import java.util.Scanner;

public class Main {
    
    public static void main(String[] args) {
    
        //輸入
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String array[] = new String[n];
        for (int i = 0; i < n; i++) {
    
            array[i] = scanner.next();
        }
        
        int sum = 0;
        
        for (int i = 0; i < n; i++) {
    
            for (int j = 0; j < n; j++) {
    
                if (i != j)
                    sum += Integer.valueOf(array[i] + array[j]);
            }
        }
        System.out.println(sum);
    }
}

结果：