added solution and modified README.md for problem 11

leetcode/README.md

@@ -10,6 +10,7 @@ LeetCode
 |2|[Add Two Numbers](https://leetcode.com/problems/add-two-numbers/) | [C](./src/2.c)|Medium|
 |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|
+|11| [Container With Most Water](https://leetcode.com/problems/container-with-most-water/) | [C](./src/11.c)|Medium|
 |20|[Valid Parentheses](https://leetcode.com/problems/valid-parentheses/) | [C](./src/20.c)|Easy|
 |21|[Merge Two Sorted Lists](https://leetcode.com/problems/merge-two-sorted-lists/) | [C](./src/21.c)|Easy|
 |24|[Swap Nodes in Pairs](https://leetcode.com/problems/swap-nodes-in-pairs/) | [C](./src/24.c)|Medium|

leetcode/src/11.c

@@ -0,0 +1,30 @@
+//Fucntion to calculate min of values a and b
+int min(int a, int b){
+    return ((a<b)?a:b);
+}
+
+//Two pointer approach to find maximum container area
+int maxArea(int* height, int heightSize){
+
+    //Start with maximum container width
+    int start = 0;
+    int end = heightSize-1;
+    int res = 0;
+
+    while(start<end){
+        //Calculate current area by taking minimum of two heights
+        int currArea = (end-start)*min(height[start],height[end]);
+        
+        if(currArea>res)
+            res = currArea;
+
+        if(height[start]<height[end])
+            start = start + 1;
+        else
+            end = end - 1;
+            
+    }
+    
+    return res;
+    
+}