Time Limit: 1000/500 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 623141 Accepted Submission(s): 157688
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
Sample Output
1 5050
Author
DOOM III
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Time Limit: 1000/500 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 623141 Accepted Submission(s): 157688
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
Sample Output
1
5050
Author
DOOM III
Recommend
We have carefully selected several similar problems for you: 1002 1090 1003 1091 1004
import java.util.Scanner;
public class Main {
private static Scanner sc = new Scanner(System.in);
public static void main(String[] args) {
while(sc.hasNextInt()) {
int a = sc.nextInt();
int sum = 0;
for(int i=1;i<=a;i++) {
sum += i;
}
System.out.println(sum);
System.out.println();
}
}
}