[BOJ] 2965번 캥거루 세마리

문제

www.acmicpc.net/problem/2965

2965번: 캥거루 세마리

풀이

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

public class Main {
	
	static int[] pos;
	public static void main(String[] args) throws IOException {
        //선언 및 입력
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	StringTokenizer st;
    	StringBuilder sb = new StringBuilder();
    	int cnt=0;
    	pos = new int[3];
    	st = new StringTokenizer(br.readLine());
    	for(int i=0;i<3;i++)
    		pos[i] = Integer.parseInt(st.nextToken());
    	
    	//계산
    	while(true) {
    		if(pos[2]-pos[1]==1 && pos[1]-pos[0]==1)
    			break;
    		if((pos[1]-pos[0]>(pos[2]-pos[1]))){
        		pos[2] = pos[1];
    			pos[1] = pos[1]-1;
        	}
        	else {
        		pos[0] = pos[1];
        		pos[1] = pos[1]+1;
        	}
    		cnt++;
    	}
    	System.out.println(cnt);
	}
}