diff --git a/src/problem/mod.rs b/src/problem/mod.rs
index 8b85ce2..4ccf9be 100644
--- a/src/problem/mod.rs
+++ b/src/problem/mod.rs
@@ -90,4 +90,5 @@ mod p2580_count_ways_to_group_overlapping_ranges;
 mod p1997_first_day_where_you_have_been_in_all_the_rooms;
 mod p2908_minimum_sum_of_mountain_triplets_i;
 mod p2952_minimum_number_of_coins_to_be_added;
-mod p331_verify_preorder_serialization_of_a_binary_tree;
\ No newline at end of file
+mod p331_verify_preorder_serialization_of_a_binary_tree;
+mod p88_merge_sorted_array;
\ No newline at end of file
diff --git a/src/problem/p88_merge_sorted_array.rs b/src/problem/p88_merge_sorted_array.rs
new file mode 100644
index 0000000..cf9533c
--- /dev/null
+++ b/src/problem/p88_merge_sorted_array.rs
@@ -0,0 +1,65 @@
+/**
+ * [88] Merge Sorted Array
+ */
+pub struct Solution {}
+
+
+// submission codes start here
+
+impl Solution {
+    pub fn merge(nums1: &mut Vec<i32>, m: i32, nums2: &mut Vec<i32>, n: i32) {
+        let (m, n) = (m as usize, n as usize);
+        let mut result = Vec::with_capacity(m + n);
+
+        let (mut i, mut j) = (0, 0);
+
+        while i < m || j < n {
+            if i == m {
+                while j < n {
+                    result.push(nums2[j]);
+                    j += 1;
+                }
+
+                break;
+            }
+
+            if j == n {
+                while i < m {
+                    result.push(nums1[i]);
+                    i += 1;
+                }
+
+                break;
+            }
+
+
+            if nums1[i] < nums2[j] {
+                result.push(nums1[i]);
+                i += 1;
+            } else {
+                result.push(nums2[j]);
+                j += 1;
+            }
+        }
+
+        for (index, &value) in result.iter().enumerate() {
+            nums1[index] = value;
+        }    
+    }
+}
+
+// submission codes end
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_88() {
+        let mut nums1 = vec![1];
+        let mut nums2 = vec![];
+
+        Solution::merge(&mut nums1, 1, &mut nums2, 0);
+        assert_eq!(nums1, vec![1]);
+    }
+}