#include <cstdlib>
#include <iostream>
#include <fstream>
#include <ctime>
#include <cmath>

using namespace std;

int main(int argc, char **argv)
{
  ofstream out("out.txt");
  double px=0, py=0;
  srand(time(NULL));
  for(unsigned int i = 0;i < 1000000; i++) {
    int r = rand()&0x3;    
    
    switch(r) {
    case 0: px+= 1; break;
    case 1: px -= 1; break;
    case 2: py += 1; break;
    case 3: py -= 1; break;            
    }
    
    out << sqrt(px*px+py*py) << endl;
    cout << sqrt(px*px+py*py) << "\n";
  }
  
  system("PAUSE");
  return 0;
}