From 0a1fd7ed34e3a15f6ac3f646d30c9f0b6db5d3ed Mon Sep 17 00:00:00 2001 From: Yidi Date: Fri, 22 Mar 2024 12:21:09 +0100 Subject: change extended euclid --- math/shortModInv.cpp | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'math/shortModInv.cpp') diff --git a/math/shortModInv.cpp b/math/shortModInv.cpp index 747eb7a..244bacf 100644 --- a/math/shortModInv.cpp +++ b/math/shortModInv.cpp @@ -1,3 +1,3 @@ -ll inv(ll a, ll b){ // a^{-1} mod b - return 1 < a ? b - inv(b % a, a) * b / a : 1; -} \ No newline at end of file +ll multInv(ll x, ll m) { // x^{-1} mod m + return 1 < x ? m - inv(m % x, x) * m / x : 1; +} -- cgit v1.2.3