HDOJ 1096 A+B for Input-Output Practice (VIII)

Problem Description
Your task is to calculate the sum of some integers.

Input
Input contains an integer N in the first line, and then N lines follow. Each line starts with a integer M, and then M integers follow in the same line.

Output
For each group of input integers you should output their sum in one line, and you must note that there is a blank line between outputs.

Sample Input
3
4 1 2 3 4
5 1 2 3 4 5
3 1 2 3

Sample Output
10

15

6

import java.util.*;class Main{    public static void main(String args[]){        Scanner sc = new Scanner(System.in);        boolean isFirst = true;        int m=sc.nextInt();        while(m-->0){            int n=sc.nextInt();            int sum=0;            for(int i=0;i<n;i++){            int a=sc.nextInt();            sum+=a;            }            if(isFirst){                isFirst=false;            }else{                System.out.println();            }            System.out.println(sum);        }    }}