#include <bits/stdc++.h>
#pragma GCC target("avx")
#pragma GCC optimize(3)
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping")
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-fwhole-program")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-fstrict-overflow")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-skip-blocks")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("-funsafe-loop-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
using namespace std;
long long n, m, p, t, s, u, a[1000005], h[1000005], v[1000005], g[5002][5002],
    f[2][5002];
inline long long read() {
  long long s = 0, w = 1;
  char ch = getchar();
  while (ch <= '0' || ch > '9') {
    if (ch == '-') w = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') s = s * 10 + ch - '0', ch = getchar();
  return s * w;
}
int main() {
  n = read();
  m = read();
  p = read();
  for (int i = 1; i <= n; i++) {
    a[i] = read();
    if (a[i] > t) t = a[i];
  }
  h[0] = v[m] = g[0][0] = s = 1;
  for (int i = 1; i <= m; i++) h[i] = h[i - 1] * i % p;
  for (int i = m; i > 0; i--) v[i - 1] = v[i] * i % p;
  for (int i = 1; i <= t; i++)
    for (int j = 1; j <= i && j <= m; j++)
      g[i][j] = (g[i - 1][j - 1] + g[i - 1][j] * (j - 1) % p) % p;
  long long b = 0;
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= t; j++) f[b][j] = 0;
    for (int j = 1; j <= a[i] && j <= m; j++)
      f[b][j] =
          ((v[m - j] * s % p - f[b ^ 1][j] * h[j] % p) * g[a[i]][j] % p + p) %
          p,
      u = (u + f[b][j]) % p;
    s = u, u = 0;
    b ^= 1;
  }
  printf("%lld\n", s);
  return 0;
}
