[백준] 6749 : Next in line(JAVA)

백준 6749 자바

Next in line

문제

You know a family with three children. Their ages form an arithmetic sequence: the difference in ages between the middle child and youngest child is the same as the difference in ages between the oldest child and the middle child. For example, their ages could be 5, 10 and 15, since both adjacent pairs have a difference of 5 years.

Given the ages of the youngest and middle children, what is the age of the oldest child?

입력

The input consists of two integers, each on a separate line. The first line is the age Y of the youngest child (0 ≤ Y ≤ 50). The second line is the age M of the middle child (Y ≤ M ≤ 50).

출력

The output will be the age of the oldest child.

예제 입력 1

12
15

예제 출력 1

18

시간 제한 메모리 제한 제출 정답 맞힌 사람 정답 비율

1 초

128 MB

5595

4860

4665

87.180%

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나이터울이 다 같으니 그거에 맞게 맏이 나이를 구해달라 는 뜻이다.

코드

import java.util.Scanner;

public class B6749 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int youngest = sc.nextInt();
		int middle = sc.nextInt();
		sc.close();

		System.out.println(middle + (middle - youngest));

	}

}