nkIO方法

import java.util.*;

public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            int sum = 0;
            String[] strs = sc.nextLine().trim().split(" ");
            int n = Integer.parseInt(strs[0]);
            if(n > 0){
                for(int i = 1;i <= n;i++){
                    sum += Integer.parseInt(strs[i]);
                }
                System.out.println(sum);
            }
        }
    }
}

import java.util.*;
public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNext()){
            sc.nextLine();
            int sum = 0;
            int n = sc.nextInt();
            for(int i = 0; i < n; i++){
                sum+= sc.nextInt();
            }
            System.out.println(sum);
        }
        
    }
}