From ab40e44682b10ac6f99827f764d4c90d93d66722 Mon Sep 17 00:00:00 2001
From: Gloria Mundi <gloria@gloria-mundi.eu>
Date: Mon, 30 Jun 2025 23:47:16 +0200
Subject: various minor changes

---
 content/math/transforms/andTransform.cpp      | 4 ++--
 content/math/transforms/bitwiseTransforms.cpp | 6 +++---
 content/math/transforms/orTransform.cpp       | 4 ++--
 content/math/transforms/xorTransform.cpp      | 2 +-
 4 files changed, 8 insertions(+), 8 deletions(-)

(limited to 'content/math/transforms')

diff --git a/content/math/transforms/andTransform.cpp b/content/math/transforms/andTransform.cpp
index 9e40c74..87bae0b 100644
--- a/content/math/transforms/andTransform.cpp
+++ b/content/math/transforms/andTransform.cpp
@@ -3,6 +3,6 @@ void fft(vector<ll>& a, bool inv = false) {
 	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) = inv ? pair(u - v, v) : pair(u + v, v);
+				ll &u = a[j], &v = a[j + s];
+				u = inv ? u - v : u + v;
 }}}}
diff --git a/content/math/transforms/bitwiseTransforms.cpp b/content/math/transforms/bitwiseTransforms.cpp
index 17f3163..c0f6e50 100644
--- a/content/math/transforms/bitwiseTransforms.cpp
+++ b/content/math/transforms/bitwiseTransforms.cpp
@@ -3,9 +3,9 @@ void bitwiseConv(vector<ll>& a, bool inv = false) {
 	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) = inv ? pair(u - v, v) : pair(u + v, v); // AND
-				//tie(u, v) = inv ? pair(u, v - u) : pair(u, v + u); //OR
+				ll &u = a[j], &v = a[j + s];
+				u = inv ? u - v : u + v; // AND
+				//v = inv ? v - u : v + u; // OR
 				//tie(u, v) = pair(u + v, u - v); // XOR
 	}}}
 	//if (inv) for (ll& x : a) x /= n; // XOR (careful with MOD)
diff --git a/content/math/transforms/orTransform.cpp b/content/math/transforms/orTransform.cpp
index 6503a68..1833ac5 100644
--- a/content/math/transforms/orTransform.cpp
+++ b/content/math/transforms/orTransform.cpp
@@ -3,6 +3,6 @@ void fft(vector<ll>& a, bool inv = false) {
 	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) = inv ? pair(u, v - u) : pair(u, v + u);
+				ll &u = a[j], &v = a[j + s];
+				v = inv ? v - u : v + u;
 }}}}
diff --git a/content/math/transforms/xorTransform.cpp b/content/math/transforms/xorTransform.cpp
index 075aac3..aa3db8d 100644
--- a/content/math/transforms/xorTransform.cpp
+++ b/content/math/transforms/xorTransform.cpp
@@ -3,7 +3,7 @@ void fft(vector<ll>& a, bool inv = false) {
 	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];
+				ll &u = a[j], &v = a[j + s];
 				tie(u, v) = pair(u + v, u - v);
 	}}}
 	if (inv) for (ll& x : a) x /= n;
-- 
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