1 files changed, 63 insertions, 0 deletions
diff --git a/2024/day25.rs b/2024/day25.rs
new file mode 100644
index 0000000..507c53d
--- /dev/null
+++ b/2024/day25.rs
@@ -0,0 +1,63 @@
+#![allow(dead_code)]
+#![allow(unused_variables)]
+#![allow(unused_mut)]
+use std::env;
+use std::fs::File;
+use std::io::Read;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let filename = if args.len() == 1 {
+        "in/".to_owned() + args[0].split('/').last().unwrap() + ".pzl"
+    } else {
+        args[1].clone()
+    };
+    let mut f = File::open(filename).expect("cannot open file");
+    let mut content = String::new();
+    f.read_to_string(&mut content).expect("cannot read file");
+    let paras = content.trim_end().split("\n\n");
+
+    let mut locks: Vec<Vec<i64>> = Vec::new();
+    let mut keys: Vec<Vec<i64>> = Vec::new();
+
+    for para in paras {
+        let mut para = para.split("\n");
+        let line = para.next().unwrap();
+
+        if line == "#####" {
+            let mut key = vec![0; 5];
+            for line in para {
+                for (i, c) in line.chars().enumerate() {
+                    if c == '#' {
+                        key[i] += 1;
+                    }
+                }
+            }
+            keys.push(key)
+        } else {
+            let mut lock = vec![-1; 5];
+            for line in para {
+                for (i, c) in line.chars().enumerate() {
+                    if c == '#' {
+                        lock[i] += 1;
+                    }
+                }
+            }
+            locks.push(lock)
+        }
+    }
+    //println!("{:?}", locks);
+    //println!("{:?}", keys);
+
+    let mut res1 = 0;
+    for l in locks.clone() {
+        for k in keys.clone() {
+            if l.iter().zip(k.iter()).map(|(a, b)| a + b).all(|x| x <= 5) {
+                res1 += 1;
+            }
+        }
+    }
+
+    println!("res1: {}", res1);
+    assert_eq!(res1, 2993);
+}