[BaekJoon] 3046번 - R2 [Java][C++]
[BaekJoon] 3046번 - R2 [Java][C++]
1. 문제 풀이
$S = \dfrac{R1 + R2}{2}$ 이므로 $R2 = 2 \times S - R1$ 이다.
2. 코드
1. 풀이 [Java]
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import java.io.*;
import java.util.*;
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer(br.readLine());
int R1 = Integer.parseInt(st.nextToken());
int S = Integer.parseInt(st.nextToken());
System.out.println(2 * S - R1);
}
}
2. 풀이 [C++]
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#include <bits/stdc++.h>
using namespace std;
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int r1, s;
cin >> r1 >> s;
cout << 2 * s - r1;
}
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