#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<time.h>
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
#define MIN(x, y) (((x) < (y)) ? (x) : (y))

int main()
{
	int i,j,s1,s2,s,r;
	srand(time(NULL));
	for(i=0,j=0;i<1000000;i++)
	{
		s1=rand()%1000;
		s2=rand()%1000;
		s=rand()%1000;
		if(rand()%2==0) r=s1; else r=s2;
		if(r<=s && r==MIN(s1,s2)) j++;
		else if(r>s && r==MAX(s1,s2)) j++;

	}
	printf("%f",(float) j/i);
	return 0;
}