From 8089545c22b1ae4a98e967f070c3e298e6808961 Mon Sep 17 00:00:00 2001
From: Aleksa Vuckovic <aleksa@vuckovic.cc>
Date: Wed, 6 Dec 2023 01:45:05 +0100
Subject: Initial commit

---
 src/day3pt2.rs | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 src/day3pt2.rs

(limited to 'src/day3pt2.rs')

diff --git a/src/day3pt2.rs b/src/day3pt2.rs
new file mode 100644
index 0000000..61d0fd1
--- /dev/null
+++ b/src/day3pt2.rs
@@ -0,0 +1,69 @@
+use regex::Regex;
+
+struct Broj {
+    broj: u32,
+    x: i32,
+    y: i32,
+    len: i32,
+}
+
+struct Simbol {
+    x: i32,
+    y: i32,
+}
+
+pub fn main() {
+    let txt = std::fs::read_to_string("./input/day3.txt").unwrap();
+    let brojevi = Regex::new(r"\d+").unwrap();
+    let simboli = Regex::new(r"[^0-9.]+").unwrap();
+
+    let mut vbr: Vec<Broj> = vec![];
+    let mut vsim: Vec<Simbol> = vec![];
+    let mut w = 0;
+    let mut h = 0;
+
+    for line in txt.lines() {
+        if w == 0 {
+            w = line.len();
+        }
+
+        let m = brojevi.captures_iter(line).collect::<Vec<_>>();
+        for i in m {
+            let broji = i.get(0).unwrap().as_str().parse::<u32>().unwrap();
+            let xi = i32::try_from(i.get(0).unwrap().start()).unwrap();
+            let leni = i32::try_from(i.get(0).unwrap().as_str().len()).unwrap();
+            vbr.push(Broj {
+                broj: broji,
+                x: xi,
+                y: h,
+                len: leni,
+            });
+        }
+
+        let s = simboli.captures_iter(line).collect::<Vec<_>>();
+        for i in s {
+            let xi = i32::try_from(i.get(0).unwrap().start()).unwrap();
+            vsim.push(Simbol { x: xi, y: h });
+        }
+
+        h += 1;
+    }
+
+    let mut sum: u32 = 0;
+
+    for sim in vsim.as_slice() {
+        let mut cnt: u32 = 0;
+        let mut ratio: u32 = 1;
+        for br in vbr.as_slice() {
+            if i32::abs(sim.y - br.y) < 2 && br.x - 1 <= sim.x && sim.x <= br.x + br.len {
+                cnt += 1;
+                ratio *= br.broj;
+            }
+        }
+        if cnt == 2 {
+            sum += ratio;
+        }
+    }
+
+    println!("{}", sum);
+}
-- 
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