diff --git a/leetcode/src/d18/_1861_rotating_the_box.rs b/leetcode/src/d18/_1861_rotating_the_box.rs
new file mode 100644
index 0000000..95137bc
--- /dev/null
+++ b/leetcode/src/d18/_1861_rotating_the_box.rs
@@ -0,0 +1,42 @@
+struct Solution;
+
+impl Solution {
+    pub fn rotate_the_box(b: Vec<Vec<char>>) -> Vec<Vec<char>> {
+        let n = b.len();
+        let m = b[0].len();
+        let mut a = vec![];
+        for _ in 0..m {
+            a.push(vec!['.'; n]);
+        }
+        for i in 0..n {
+            let mut x = m;
+            let mut y = m;
+            for _j in 0..m {
+                match b[i][x - 1] {
+                    '.' => {}
+                    '*' => {
+                        a[x - 1][n - 1 - i] = '*';
+                        y = x - 1;
+                    }
+                    '#' => {
+                        a[y - 1][n - 1 - i] = '#';
+                        y -= 1;
+                    }
+                    _ => {}
+                }
+                x -= 1;
+            }
+        }
+        a
+    }
+}
+
+#[test]
+fn test() {
+    let b: Vec<Vec<char>> = vec_vec_char![['#', '.', '#']];
+    let a: Vec<Vec<char>> = vec_vec_char![['.'], ['#'], ['#']];
+    assert_eq!(Solution::rotate_the_box(b), a);
+    let b: Vec<Vec<char>> = vec_vec_char![['#', '.', '*', '.'], ['#', '#', '*', '.']];
+    let a: Vec<Vec<char>> = vec_vec_char![['#', '.'], ['#', '#'], ['*', '*'], ['.', '.']];
+    assert_eq!(Solution::rotate_the_box(b), a)
+}
diff --git a/leetcode/src/d18/mod.rs b/leetcode/src/d18/mod.rs
index d7670e0..692dcd4 100644
--- a/leetcode/src/d18/mod.rs
+++ b/leetcode/src/d18/mod.rs
@@ -63,6 +63,8 @@ mod _1854_maximum_population_year;
 //
 mod _1859_sorting_the_sentence;
 //
+mod _1861_rotating_the_box;
+//
 mod _1863_sum_of_all_subset_xor_totals;
 //
 mod _1869_longer_contiguous_segments_of_ones_than_zeros;