mzuenni tests

1 files changed, 10 insertions, 0 deletions

diff --git a/content/math/transforms/xorTransform.cpp b/content/math/transforms/xorTransform.cpp
new file mode 100644
index 0000000..f9d1d82
--- /dev/null
+++ b/content/math/transforms/xorTransform.cpp
@@ -0,0 +1,10 @@
+void fft(vector<ll>& a, bool inv = false) {
+	int n = sz(a);
+	for (int s = 1; s < n; s *= 2) {
+		for (int i = 0; i < n; i += 2 * s) {
+			for (int j = i; j < i + s; j++) {
+				ll& u = a[j], &v = a[j + s];
+				tie(u, v) = pair(u + v, u - v);
+	}}}
+	if (inv) for (ll& x : a) x /= n;
+}