1 files changed, 60 insertions, 0 deletions
diff --git a/src/day13pt2.rs b/src/day13pt2.rs
new file mode 100644
index 0000000..5af732b
--- /dev/null
+++ b/src/day13pt2.rs
@@ -0,0 +1,60 @@
+pub fn f(input: Vec<Vec<char>>) -> u64 {
+    for x in 1..input[0].len() {
+        let mut cnt: u32 = 0;
+
+        for i in 0..input.len() {
+            for j in 0..x {
+                if 2 * x - 1 - j >= input[0].len() {
+                    continue;
+                }
+                if input[i][j] != input[i][2 * x - 1 - j] {
+                    cnt += 1;
+                }
+            }
+        }
+
+        if cnt == 1 {
+            return x as u64;
+        }
+    }
+
+    for y in 1..input.len() {
+        let mut cnt: u32 = 0;
+
+        for i in 0..y {
+            for j in 0..input[i].len() {
+                if 2 * y - 1 - i >= input.len() {
+                    continue;
+                }
+                if input[i][j] != input[2 * y - 1 - i][j] {
+                    cnt += 1;
+                }
+            }
+        }
+
+        if cnt == 1 {
+            return (y * 100) as u64;
+        }
+    }
+
+    panic!();
+}
+
+pub fn main() {
+    let txt = std::fs::read_to_string("./input/day13.txt").unwrap();
+    let input = txt
+        .split("\n\n")
+        .map(|s| {
+            s.lines()
+                .map(|s| s.chars().collect::<Vec<char>>())
+                .collect::<Vec<_>>()
+        })
+        .collect::<Vec<_>>();
+
+    let mut sum: u64 = 0;
+    for i in input {
+        sum += f(i);
+    }
+
+    println!("{}", sum);
+}