#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
// s = 1/1 + 1/2 + 1/3 + 1/4 +...+ 1/20

//   1/i      s = s + (1/i)
int main(int argc, char *argv[]) {
	
	float i;
	double s=0;
	
	i = 1.0;
	while(i<=20000)
	{
		s = s + (1/i);
		i++;
	}
	
	printf("S = %f",s);

	return 0;
}