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

typedef int32_t i32;
typedef int64_t i64;

void run (void) {
  i32 n, m;
  scanf ("%" SCNi32 "%" SCNi32, &n, &m);
  i32 *a = (i32 *) calloc (n, sizeof (i32));
  for (i32 i = 0; i < n; ++i) {
    scanf ("%" SCNi32, a + i);
  }
  i32 l = 0;
  while (l < n) {
    if (a[l] % 2 == 0) {
      l++;
      continue;
    }
    i64 sum = a[l];
    i32 r = l + 1;
    while (r < n && a[r] % 2 == 1) {
      sum += a[r++];
    }
    if (r - l >= m) {
      printf ("%" PRIi64 "\n", sum);
    }
    l = r;
  }
}

void solve (void) {
  i32 n, m;
  scanf ("%" SCNi32 "%" SCNi32, &n, &m);
  if (n >= m) {
    puts("0");
    return;
  }
  i32 ans = 1;
  while (n > 0) {
    ans = (i64) ans * n-- % m;
  }
  printf ("%" PRIi32 "\n", ans);
}

int main (void) {
  solve();
  //run ();
  return 0;
}