#include <iostream>
#include <fstream>
#include <cmath>

#define MIN(a,b) ((a)<(b))?(a):(b)

const char IN[] = "fact.in", OUT[] = "fact.out";

using namespace std;

int P;

inline void read_data() {
	fscanf(fopen(IN, "r"), "%d", &P);
}

int perm_count_zeros(int x) {
	int total = 0;
	for (int b5 = 5, cnt = -1; cnt != 0; b5 *= 5) {
		cnt = floor(x/b5);
		total += cnt;
	}
	return total;
}

inline int find_fact(int P) {
	if (P == 0) return 1;
	int low = 1, high = 100000000;
	while (low < high) {
		int m = low + (high - low) / 2;
		int count = perm_count_zeros(m);
		if (count == P && perm_count_zeros(m-1) != P) return m;
		if (count < P) low = m + 1;
		else high = m - 1;
	}
}

int main() {
	read_data();
	printf("%d\n", perm_count_zeros(4617));
	fprintf(fopen(OUT, "w"), "%d\n", find_fact(P));
	return 0;
}