diff --git a/leetcode/README.md b/leetcode/README.md
index bffa4aa3..08e6a096 100644
--- a/leetcode/README.md
+++ b/leetcode/README.md
@@ -8,6 +8,7 @@ LeetCode
 |---| ----- | -------- | ---------- |
 |1|[Two Sum](https://https://leetcode.com/problems/two-sum/) | [C](./src/1.c)|Easy
 |3|[Longest Substring Without Repeating Characters](https://leetcode.com/problems/longest-substring-without-repeating-characters/) | [C](./src/3.c)|Medium|
+|4|[Median of Two Sorted Arrays](https://leetcode.com/problems/median-of-two-sorted-arrays/) | [C](./src/4.c)|Hard|
 |20|[Valid Parentheses](https://leetcode.com/problems/valid-parentheses/) | [C](./src/20.c)|Easy|
 |24|[Swap Nodes in Pairs](https://leetcode.com/problems/swap-nodes-in-pairs/) | [C](./src/24.c)|Medium|
 |26|[Remove Duplicates from Sorted Array](https://leetcode.com/problems/remove-duplicates-from-sorted-array/) | [C](./src/26.c)|Easy|
diff --git a/leetcode/src/4.c b/leetcode/src/4.c
new file mode 100644
index 00000000..b5a2e830
--- /dev/null
+++ b/leetcode/src/4.c
@@ -0,0 +1,40 @@
+
+
+double findMedianSortedArrays(int* nums1, int nums1Size, int* nums2, int nums2Size){
+    int index1=0;
+    int index2=0;
+    int v[nums1Size+nums2Size];
+    int v_index=0;
+    
+    while(index1<nums1Size && index2<nums2Size){
+        if(nums1[index1]<=nums2[index2]){
+            v[v_index++]=nums1[index1++];
+        }
+        else{
+            v[v_index++]=nums2[index2++];
+        }
+    }
+    if(index1<nums1Size){
+        while(index1<nums1Size){
+            v[v_index++]=nums1[index1++];
+        }
+    }
+    if(index2<nums2Size){
+        while(index2<nums2Size){
+            v[v_index++]=nums2[index2++];
+        }
+    }
+    if(v_index==1){
+        return v[0];
+    }
+    if(v_index%2==0){
+        double n1,n2;
+        n1=v[v_index/2];
+        n2=v[(v_index/2)-1];
+        return (n1+n2)/2;
+    }
+    int new_index=(int)v_index/2;
+    int i=0;
+    return v[new_index];
+}
+