diff --git a/src/problem/mod.rs b/src/problem/mod.rs
index a8d26a3..49646a5 100644
--- a/src/problem/mod.rs
+++ b/src/problem/mod.rs
@@ -492,3 +492,5 @@ mod p1706_where_will_the_ball_fall;
 mod p1299_replace_elements_with_greatest_element_on_right_side;
 
 mod p2080_range_frequency_queries;
+
+mod p624_maximum_distance_in_arrays;
diff --git a/src/problem/p624_maximum_distance_in_arrays.rs b/src/problem/p624_maximum_distance_in_arrays.rs
new file mode 100644
index 0000000..50c59a9
--- /dev/null
+++ b/src/problem/p624_maximum_distance_in_arrays.rs
@@ -0,0 +1,43 @@
+use std::thread::available_parallelism;
+
+/**
+ * [624] Maximum Distance in Arrays
+ */
+pub struct Solution {}
+
+// submission codes start here
+
+impl Solution {
+    pub fn max_distance(arrays: Vec<Vec<i32>>) -> i32 {
+        let mut result = 0;
+        // -10e4 <= array[i][j] <= 10e4
+        let (mut min, mut max) = (10_000 + 1, -10_000 - 1);
+
+        for array in arrays {
+            result = result
+                .max(*array.last().unwrap() - min)
+                .max(max - *array.first().unwrap());
+
+            min = min.min(*array.first().unwrap());
+            max = max.max(*array.last().unwrap());
+        }
+
+        result
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_624() {
+        assert_eq!(
+            4,
+            Solution::max_distance(vec![vec![1, 2, 3], vec![4, 5], vec![1, 2, 3]])
+        );
+        assert_eq!(0, Solution::max_distance(vec![vec![1], vec![1]]));
+    }
+}