[백준알고리즘] Java 8393번

 

import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = 0;
        for(int i = 1; i <= a; i++){
            b += i;
        }
        System.out.println(b);
    }
}

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