【杭电1001】Sum Problem
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Sum Problem
Time Limit: 1000/500 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 448087 Accepted Submission(s): 112622
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.
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
1100
Sample Output
15050code:import java.util.*;public class Main{public static void main(String[] args){Scanner in=new Scanner(System.in);while(in.hasNextInt()){int n=in.nextInt();int sum=0;for(int i=1;i<=n;i++)sum+=i;System.out.println(sum+"\n\n");}}}
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