第 043 场 AtCoder Beginner Contest
孩子与糖果（ABC 版）AI (CI翻译)
Problem Statement
题目描述
AI (CI翻译)There are $N$ children in AtCoder Kindergarten. Mr. Evi will arrange the children in a line, then give $1$ candy to the first child in the line, $2$ candies to the second child, ..., $N$ candies to the $N$-th child. How many candies will be necessary in total?
AtCoder 幼儿园里有 $N$ 个孩子。Evi 老师会让孩子们排成一队，然后给队伍中的第一个孩子 $1$ 颗糖果，给第二个孩子 $2$ 颗糖果，……，给第 $N$ 个孩子 $N$ 颗糖果。一共需要多少颗糖果？AI (CI翻译)
Constraints
约束条件
AI (CI翻译)$1≦N≦100$
$1≦N≦100$
Input
输入格式
AI (CI翻译)The input is given from Standard Input in the following format:
输入通过标准输入给出，格式如下：AI (CI翻译)
NNOutput
输出格式
AI (CI翻译)Print the necessary number of candies in total.
输出所需糖果的总数。AI (CI翻译)
样例
Input #1
3
Output #1
6
The answer is $1+2+3=6$.
Input #2
10
Output #2
55
The sum of the integers from $1$ to $10$ is $55$.
Input #3
1
Output #3
1
Only one child. The answer is $1$ in this case.
题目信息
题面与样例版权归 AtCoder 及出题人所有；中文翻译由 AI 生成（gpt-6.1-sol），如有出入请以原文为准。