#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define NUM 1000
int main()
{
  int count;
  float x,y,theta,counter=0,pi;
  srand((unsigned) time(NULL));
  for(count=0;count<NUM;count++){
    x=rand()%10+0.0001*(rand()%10000)+0.000001*(rand()%100);
    theta=rand();
    y=x+sin(theta);
    if((int)(x)!=(int)(y))
      counter=counter+1;
  }
  pi=2/(counter/NUM);
  printf("%f\n",pi);
}