[백준] 기본 수학 1 - (Java) 1712번 손익분기점

제출

import java.io.*;
import java.util.StringTokenizer;

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 a = Integer.parseInt(st.nextToken());
    int b = Integer.parseInt(st.nextToken());
    int c = Integer.parseInt(st.nextToken());

    int sales1 = (c - (a + b));
    if (0 < sales1) {
      System.out.print(1);
      return;
    }

    int sales2 = (c * 2 - (a + (b * 2)));

    System.out.print(sales1 < sales2 ? (sales1 / (sales1 - sales2)) + 2 : -1);
  }
}

 

규칙 찾기

BOJ 1712번.xlsx

0.02MB

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더 간단한 규칙

 (A / (C - B) + 1)

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출처: https://www.acmicpc.net/problem/1712

1712번: 손익분기점