【Codeforces 493D】Vasya and Chess

【链接】 我是链接,点我呀:)

【题意】

【题解】

会发现两个皇后之间如果只有奇数个位置
也就是n%2==1
那么第二个人总是赢的
因为如果white往下跑的话,black也能往下跑。
第二个人没有输的机会。
其他情况就是第一个人赢了…

【代码】

import java.io.*;
import java.util.*;public class Main {    static InputReader in;
    static PrintWriter out;    public static void main(String[] args) throws IOException{
        //InputStream ins = new FileInputStream("E:\\rush.txt");
        InputStream ins = System.in;
        in = new InputReader(ins);
        out = new PrintWriter(System.out);
        //code start from here
        new Task().solve(in, out);
        out.close();
    }    static int N = 50000;
    static class Task{        int n;        public void solve(InputReader in,PrintWriter out) {
        n = in.nextInt();
        if ( n%2==0) {
        out.println("white\n1 2");
        }else {
        out.println("black");
        }
        }
    }    static class InputReader{
        public BufferedReader br;
        public StringTokenizer tokenizer;        public InputReader(InputStream ins) {
            br = new BufferedReader(new InputStreamReader(ins));
            tokenizer = null;
        }        public String next(){
            while (tokenizer==null || !tokenizer.hasMoreTokens()) {
                try {
                tokenizer = new StringTokenizer(br.readLine());
                }catch(IOException e) {
                    throw new RuntimeException(e);
                }
            }
            return tokenizer.nextToken();
        }        public int nextInt() {
            return Integer.parseInt(next());
        }
    }
}