From 7ca1851f732e2f74339354ecc25ef709754a3ac3 Mon Sep 17 00:00:00 2001
From: Oscar Najera <hi@oscarnajera.com>
Date: Tue, 6 Dec 2022 17:26:18 +0100
Subject: [AoC2022] 06 Rust & Elixir

---
 AoC2022/06/solver.rs | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 AoC2022/06/solver.rs

(limited to 'AoC2022/06/solver.rs')

diff --git a/AoC2022/06/solver.rs b/AoC2022/06/solver.rs
new file mode 100644
index 0000000..0d59479
--- /dev/null
+++ b/AoC2022/06/solver.rs
@@ -0,0 +1,27 @@
+use std::fs;
+use std::io::{self, Read};
+
+fn solver(bytes: &Vec<u8>, marker_len: u32) -> u32 {
+    let mut count = marker_len;
+    for view in bytes.windows(marker_len as usize) {
+        let mut acc: u32 = 0;
+        for elt in view {
+            acc |= 1 << (elt - 96);
+        }
+        if u32::count_ones(acc) >= marker_len {
+            break;
+        }
+        count += 1;
+    }
+    count
+}
+
+fn main() -> io::Result<()> {
+    let mut file = fs::File::open("input").unwrap();
+    let mut bytes: Vec<u8> = Vec::new();
+    file.read_to_end(&mut bytes)?;
+    println!("All test passed. {}", solver(&bytes, 4));
+    println!("All test passed. {}", solver(&bytes, 14));
+
+    Ok(())
+}
-- 
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