25-04 rust

3 files changed, 45 insertions, 0 deletions

diff --git a/2025/04/rust/Cargo.lock b/2025/04/rust/Cargo.lock
new file mode 100644
index 0000000..222070d
--- /dev/null
+++ b/2025/04/rust/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "aoc_2025-04"
+version = "0.1.0"
diff --git a/2025/04/rust/Cargo.toml b/2025/04/rust/Cargo.toml
new file mode 100644
index 0000000..b29e6d6
--- /dev/null
+++ b/2025/04/rust/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aoc_2025-04"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
diff --git a/2025/04/rust/src/main.rs b/2025/04/rust/src/main.rs
new file mode 100644
index 0000000..5d703c5
--- /dev/null
+++ b/2025/04/rust/src/main.rs
@@ -0,0 +1,32 @@
+use std::io;
+
+fn main() {
+    let mut grid: Vec<Vec<Option<usize>>> = io::stdin()
+        .lines()
+        .flatten()
+        .map(|line| line.chars().map(|ch| (ch == '@').then_some(0)).collect())
+        .collect();
+
+    for (y, row) in grid.iter().enumerate() {
+        for (x, p) in row.iter().enumerate() {
+            let Some(_) = p else {
+                continue;
+            };
+
+            for nx in x.saturating_sub(1)..=(x + 1).min(row.len() - 1) {
+                for ny in y.saturating_sub(1)..=(y + 1).min(grid.len() - 1) {
+                    // lol quadruple for loop (this makes me sad)
+                    if (x, y) == (nx, ny) {
+                        continue;
+                    }
+                    let mut h = grid.get(ny).and_then(|r| r.get(nx)).unwrap();
+                }
+            }
+        }
+    }
+
+    let silver: u64 = 0;
+    let gold: u64 = 0;
+    println!("silver: {silver}");
+    println!("gold: {gold}");
+}