From 53a8fda797e8c29f294b8d23e8f231dda9f8b320 Mon Sep 17 00:00:00 2001
From: jackfiled <xcrenchangjun@outlook.com>
Date: Mon, 9 Dec 2024 11:43:05 +0800
Subject: [PATCH] 20241209 finished.

---
 src/problem/mod.rs                            |  2 +
 ..._determine_color_of_a_chessboard_square.rs | 41 +++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 src/problem/p1812_determine_color_of_a_chessboard_square.rs

diff --git a/src/problem/mod.rs b/src/problem/mod.rs
index f6cca7e..9b1d1ae 100644
--- a/src/problem/mod.rs
+++ b/src/problem/mod.rs
@@ -358,3 +358,5 @@ mod p999_available_captures_for_rook;
 mod p688_knight_probability_in_chessboard;
 
 mod p782_transform_to_chessboard;
+
+mod p1812_determine_color_of_a_chessboard_square;
diff --git a/src/problem/p1812_determine_color_of_a_chessboard_square.rs b/src/problem/p1812_determine_color_of_a_chessboard_square.rs
new file mode 100644
index 0000000..6b5746b
--- /dev/null
+++ b/src/problem/p1812_determine_color_of_a_chessboard_square.rs
@@ -0,0 +1,41 @@
+/**
+ * [1812] Determine Color of a Chessboard Square
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn square_is_white(coordinates: String) -> bool {
+        let mut coordinates = coordinates.chars();
+        let (x, y) = (coordinates.next().unwrap(), coordinates.next().unwrap());
+
+        match x {
+            'a' | 'c' | 'e' | 'g' => match y {
+                '1' | '3' | '5' | '7' => false,
+                '2' | '4' | '6' | '8' => true,
+                _ => unimplemented!(),
+            },
+            'b' | 'd' | 'f' | 'h' => match y {
+                '1' | '3' | '5' | '7' => true,
+                '2' | '4' | '6' | '8' => false,
+                _ => unimplemented!(),
+            },
+            _ => unimplemented!(),
+        }
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_1812() {
+        assert!(!Solution::square_is_white("a1".to_owned()));
+        assert!(Solution::square_is_white("h3".to_owned()));
+        assert!(!Solution::square_is_white("c7".to_owned()));
+    }
+}