#include <bits/stdc++.h>
int getint() {
  int r = 0;
  char c = getchar();
  for (; c < '0' || c > '9'; c = getchar())
    ;
  for (; '0' <= c && c <= '9'; c = getchar()) r = r * 10 - '0' + c;
  return r;
}
int n, z = 0, two = 0, five = 0;
int min(int a, int b) { return a < b ? a : b; }
int dst[200000], ptr = 0;
int main() {
  n = getint();
  int i = 1, cnt, tmp;
  while (z <= n) {
    tmp = i;
    while (tmp % 2 == 0) ++two, tmp /= 2;
    while (tmp % 5 == 0) ++five, tmp /= 5;
    cnt = min(two, five);
    z += cnt;
    two -= cnt;
    five -= cnt;
    if (z == n) dst[ptr++] = i;
    ++i;
  }
  printf("%d\n", ptr);
  for (int i = 0; i < ptr; ++i) printf("%d ", dst[i]);
  return 0;
}
