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

public class Canon2 {

    public static void main(String[] args){

	Random rand = new Random(1);
	int counter = 0;
	double bestdistance = 0.0;
	double bestangle = 0.0;
	double bestspeed = 0.0;

	double angle = rand.nextDouble()*(Math.PI/2.0);
	double speed = rand.nextDouble()*(100);

	System.out.println("Target at 500m");
	System.out.print("Angle, Speed, Distance");
	System.out.println(", BestAngle, BestSpeed, BestDistance");

	while(true){
	    counter++;

	    double distance = (speed * speed * Math.sin( angle * 2.0 ))/9.8 ;

	    System.out.print(angle+", "+speed+", "+distance);

	    if(distance > 490 && distance < 510){
		System.out.println(", "+angle+", "+speed+", "+distance);
		break;
	    }

	    if( Math.abs(500-distance) < Math.abs(500-bestdistance) ){
		bestdistance=distance;
		bestangle=angle;
		bestspeed=speed;
	    }else{
		angle=bestangle;
		speed=bestspeed;
	    }

	    if(rand.nextDouble()<0.5){
		angle = rand.nextDouble()*(Math.PI/2.0);
	    }else{
		speed = rand.nextDouble()*(100);
	    }

	    System.out.println(", "+bestangle+", "+bestspeed+", "+bestdistance);

	}

	System.out.println(counter+" turns to hit");

    }

}