1 files changed, 0 insertions, 23 deletions
diff --git a/math/transforms/ntt.cpp b/math/transforms/ntt.cpp
deleted file mode 100644
index ca605d3..0000000
--- a/math/transforms/ntt.cpp
+++ /dev/null
@@ -1,23 +0,0 @@
-constexpr ll mod = 998244353, root = 3;
-
-void ntt(vector<ll>& a, bool inv = false) {
-	int n = sz(a);
-	auto b = a;
-	ll r = inv ? powMod(root, mod - 2, mod) : root;
-
-	for (int s = n / 2; s > 0; s /= 2) {
-		ll ws = powMod(r, (mod - 1) / (n / s), mod), w = 1;
-		for (int j = 0; j < n / 2; j += s) {
-			for (int k = j; k < j + s; k++) {
-				ll u = a[j + k], t = a[j + s + k] * w % mod;
-				b[k] = (u + t) % mod;
-				b[n/2 + k] = (u - t + mod) % mod;
-			}
-			w = w * ws % mod;
-		}
-		swap(a, b);
-	}
-	if (inv) {
-		ll div = powMod(n, mod - 2, mod);
-		for (auto& x : a) x = x * div % mod;
-}}