[백준] 5341

당당·2023년 5월 27일

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https://www.acmicpc.net/problem/5341

📔문제

A pyramid of blocks is constructed by first building a base layer of n blocks and then adding n-1 blocks to the next layer. This process is repeated until the top layer only has one block.

You must calculate the number of blocks needed to construct a pyramid given the size of the base. For example, a pyramid that has a base of size 4 will need a total of 10 blocks.

📝입력

The input will be a sequence of integers, one per line. The end of input will be signaled by the integer 0, and does not represent the base of a pyramid. All integers, other than the last (zero), are positive.

📺출력

For each positive integer print the total number of blocks needed to build the pyramid with the specified base.

📝예제 입력 1

4
6
0

📺예제 출력 1

10
21

🔍출처

High School > PLU High School Programming Contest > PLU 2013 > Novice 5번

🧮알고리즘 분류

수학
구현
사칙연산

📃소스 코드

import java.util.Scanner;

public class Code5341 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);

        while(sc.hasNext()){
            int n=sc.nextInt();

            if(n==0){
                break;
            }

            int answer=n*(n+1)/2;
            System.out.println(answer);
        }
    }
}