#include<stdio.h>
#include<stdlib.h>
double fun(int m);
int main()
{
	 int n=2000;
	 printf("\n the result is %lf\n",fun(n));
}
double fun(int m)
{
	 double y=0,d;
	 int i;
	 for(i=100;i<=m;i=i+100)
	 { 
	      d=(double)i*(double)i;
	      y+=1.0/d;
	 }
	 return (y);
}