这道题目来自杭电在线评测系统，要求计算1到n的和SUM(n)。输入为一系列整数n，输出对应每种情况的SUM(n)，保证结果在32位整数范围内。样例输入包括1和100，对应的输出分别是1和5050。
Problem Description
Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge).
In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n.
Input
The input will consist of a series of integers n, one integer per line.
Output
For each case, output SUM(n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer.
Sample Input
1
100
订阅专栏 解锁全文
扫一扫
427
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
