Update numtheory

1 files changed, 1 insertions, 3 deletions

diff --git a/Math/numtheory.cpp b/Math/numtheory.cpp
index a47a385..282e39f 100644
--- a/Math/numtheory.cpp
+++ b/Math/numtheory.cpp
@@ -1,6 +1,5 @@
 constexpr ll MOD = 1e9+7;
 
-
 inline ll pw(ll base, ll exp) {
 	ll res = 1;
 	while (exp) {
@@ -12,8 +11,7 @@ inline ll pw(ll base, ll exp) {
 inline ll inv(ll x) { return pw(x, MOD-2); }
 
 ll fact[MX] = { 1 }, ifact[MX] = { 1 };
-
 inline ll nCr(int n, int k) { return fact[n]*ifact[k]%MOD*ifact[n-k]%MOD; }
 
 
-for (int i = 0; i < N; ++i) fact[i+1] = (i+1)*fact[i]%MOD, ifact[i+1] = inv(fact[i+1]);
+for (int i = 1; i < N; ++i) fact[i] = i*fact[i-1]%MOD, ifact[i] = inv(fact[i]);