#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#define NUM 1000
int main()
{
  int i,j;
  float x,y,ysum=0,ey;
  srand((unsigned) time(NULL));
  for(i=0;i<NUM;i++){
    x=1+(float)(rand()%100000)/100000;
    y=x*log(x);
    ysum=ysum+y;
    /*    printf("%f\n",y);  */
  }
  ey=ysum/NUM;
  printf("%f\n",ey);
}