From 97d756bab48b9bcab3a946993a33c8dd105ca798 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicol=C3=A1s=20Ortega=20Froysa?= <nicolas@ortegas.org>
Date: Fri, 5 Dec 2025 14:29:06 +0100
Subject: [PATCH] Fix subtraction overflow.

---
 src/main.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 0df53f2..f5b3ca2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -76,9 +76,11 @@ fn main() {
 				arr[n2] = !arr[n2];
 			}
 
-			let n3 = ((3 * x * x) - (y * y)) as usize;
-			if x > y && n3 <= (opts.num as usize) && n3 % 12 == 11 {
-				arr[n3] = !arr[n3];
+			if x > y {
+				let n3 = ((3 * x * x) - (y * y)) as usize;
+				if n3 <= (opts.num as usize) && n3 % 12 == 11 {
+					arr[n3] = !arr[n3];
+				}
 			}
 		}
 	}