From 9543dcb9b17d5b2d15c98c5fc8df85d37b6fe3d8 Mon Sep 17 00:00:00 2001
From: Antoine Martin <antoine@alarsyo.net>
Date: Wed, 3 Dec 2025 18:28:14 +0100
Subject: [PATCH] 2025: day02: use log10 for digit number computation

---
 aoc2025/src/day02.rs | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/aoc2025/src/day02.rs b/aoc2025/src/day02.rs
index 3a119df..6388ad5 100644
--- a/aoc2025/src/day02.rs
+++ b/aoc2025/src/day02.rs
@@ -41,13 +41,7 @@ impl Iterator for IdRange {
 }
 
 fn get_num_digits(num: &u64) -> usize {
-    let mut digits = 0;
-    let mut num = *num;
-    while num != 0 {
-        num /= 10;
-        digits += 1;
-    }
-    digits
+    num.ilog10() as usize + 1
 }
 
 fn is_repeated_twice(num: &u64) -> bool {