// 1次元ランダムウォーク 

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

public class RandomWalk1Dev{
    public static void main(String[] args) throws IOException {
	//	int MAX_PARTICLES=10000;
	double x;
	double h=1.0;
	String s;

	PrintWriter pw = new PrintWriter(new FileWriter("ev.dat"));

        BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Input: random seed");
        s = buf.readLine();
        long seed = Long.parseLong(s);
        System.out.println("Input: Number of steps");
        s = buf.readLine();
        long nstep = Long.parseLong(s);

        Random rnd = new Random();
        rnd.setSeed(seed); 

	x=0.0;

	for(int istep=0; istep < nstep; istep++){
	    double ran=rnd.nextDouble();
	    if(ran<0.5)
		x=x-h;
	    else
		x=x+h;

	    System.out.println(istep+"   "+x);	    
	    pw.println(istep+"   "+x);	    

	}

	pw.close();
        	
    }
    
}