第一道交互题

#include <bits/stdc++.h>

using namespace std;

int main(int argc, char * argv[]) 
{
	int low=-1e9;
	int up=1e9;
	while(1)
	{
		int mid=(low+up)>>1;
		cout<<mid<<endl;
		//printf("%d\n",mid);
		//fflush(stdout);
		string s;
		cin>>s;
		if(s=="equal") break;
		if(s=="small") low=mid+1;
		else if(s=="big") up=mid-1;
	}
    return 0;
}

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int low=-1000000000;
		int up=1000000000;
		String s;
		do {
			int mid=(low+up)>>1;
			System.out.println(mid);
			System.out.flush();			
			s=in.nextLine();
			switch(s) {
				case "big":
					up=mid-1;
					break;
				case "small":
					low=mid+1;
					break;
				case "equal":
					break;
			}
		} while(!s.equals("equal"));
	}
}