From a5687a8c256b706a2e9054a49b39f5d3fe36b9aa Mon Sep 17 00:00:00 2001
From: subcrip <contact@subc.rip>
Date: Fri, 12 Jul 2024 00:28:58 +0800
Subject: [PATCH] Update template.cc

Signed-off-by: subcrip <contact@subc.rip>
---
 template.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/template.cc b/template.cc
index 0bf85a1..19806a7 100644
--- a/template.cc
+++ b/template.cc
@@ -250,6 +250,7 @@ return_t qpow(ll b, ll p) {
 }
 
 #define comb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] / fact[k] / fact[(n) - (k)])
+#define fastcomb(n, k) ((n) < 0 or (k) < 0 or (n) < (k) ? 0 : fact[n] * factrev[k] * factrev[(n) - (k)])
 
 constexpr inline int lg2(ll x) { return x == 0 ? -1 : sizeof(ll) * 8 - 1 - __builtin_clzll(x); }