20241121 finished.

src/problem/mod.rs

@@ -328,3 +328,5 @@ mod p661_image_smoother;
 mod p3243_shortest_distance_after_road_addition_queries_i;
 
 mod p3244_shortest_distance_after_road_addition_queries_ii;
+
+mod p3248_snake_in_matrix;

src/problem/p3248_snake_in_matrix.rs

@@ -0,0 +1,41 @@
+/**
+ * [3248] Snake in Matrix
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn final_position_of_snake(n: i32, commands: Vec<String>) -> i32 {
+        let (mut x, mut y) = (0, 0);
+
+        commands.iter().for_each(|str| match str.as_str() {
+            "UP" => x -= 1,
+            "DOWN" => x += 1,
+            "LEFT" => y -= 1,
+            "RIGHT" => y += 1,
+            _ => {}
+        });
+
+        x * n + y
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_3248() {
+        assert_eq!(
+            3,
+            Solution::final_position_of_snake(2, vec_string!("RIGHT", "DOWN"))
+        );
+        assert_eq!(
+            1,
+            Solution::final_position_of_snake(3, vec_string!("DOWN", "RIGHT", "UP"))
+        );
+    }
+}