A+B for Input-Output Practice (VIII)
emmm，经典题目的最后一题，当年却费了些周折，因为太菜了，自己读程读了半天才发现，还是有些小陷阱的，还是先审题。 emmm，经典题目的最后一题，当年却费了些周折，因为太菜了，自己读程读了半天才发现，还是有些小陷阱的，还是先审题。
Problem Description Problem Description
Your task is to calculate the sum of some integers.
Your task is to calculate the sum of some integers.
Your task is to calculate the sum of some integers.
Input 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.
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.
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 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.
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.
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 Sample Input
3 4 1 2 3 4 5 1 2 3 4 5 3 1 2 33 4 1 2 3 4 5 1 2 3 4 5 3 1 2 3
Sample Output Sample Output
10 15 610 15 6
Author Author
lcy lcy
看完题目，不少初学者与当年的我一样，肯定十分激动，天啊，这与练习五好像啊，只不过输出变了，立马把当时的代码翻出来，改了一下，就submit了。最后却只有失望的橙黄色，那么问题出在哪呢？ 看完题目，不少初学者与当年的我一样，肯定十分激动，天啊，这与练习五好像啊，只不过输出变了，立马把当时的代码翻出来，改了一下，就submit了。最后却只有失望的橙黄色，那么问题出在哪呢？
从输出不难看出，最后一个后应该没有空格，那么问题就来了，如果n=1，那么之和即是第一个又是最后一个，那肯定是不需要空格的，这就需要我们分情况讨论。现在上代码： 从输出不难看出，最后一个后应该没有空格，那么问题就来了，如果n=1，那么之和即是第一个又是最后一个，那肯定是不需要空格的，这就需要我们分情况讨论。现在上代码：
#include<stdio.h>
int main()
{
int i,j,k,n,a,sum;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%d",&j);
sum=0;
for(k=0;k<j;k++)
{
scanf("%d",&a);
sum+=a;
}
if(n==1)
{
printf("%d
",sum);
}
else
{
printf("%d
",sum);
}
}
return 0;
}其实我当时犯的错误还不止这些（还是太菜了），那么入门就写到这里，下面会写些做过的水题和才研究的新题，希望能与大家交流进步吧。
#include
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