#include <stdio.h>
#include <math.h>

int main()
{
	int i, j, x;
	long double ans = 0.0, tmp;
	scanf("%d", &x);
	if (x == 2) printf("1000000\n");
	else if (x >= 5) {
		for (i = 50; i >= x; i--) {
			for (j = 100, tmp = 0.0; j >= 1; j--) tmp += powl(j, -i);
			ans += tmp - 1.0;
		}
		printf("%d\n", (int)(ans * 1000000));
	} else {
		for (i = 50; i >= 5; i--) {
			for (j = 100, tmp = 0.0; j >= 1; j--) tmp += powl(j, -i);
			ans += tmp - 1.0;
		}
		for (j = 100, tmp = 0.0; j >= 1; j--) tmp += powl(j, -4);
		ans += tmp - 1.0;
		if (x <= 3) {
			for (j = 1000, tmp = 0.0; j >= 1; j--) tmp += powl(j, -3);
			ans += tmp - 1.0;
		}
		printf("%d\n", (int)(ans * 1000000));
	}
	fflush(stdout);
	return 0;
}