[Java] 백준 8393 합

문제

https://www.acmicpc.net/problem/8393

8393번: 합

 

풀이

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(br.readLine());
		int sum = 0;
		
		for (int i = 0; i < n; i++) {
			sum+=(i+1);
		}
		
		System.out.println(sum);
	}
}