diff --git a/binary_search.cpp b/binary_search.cpp
new file mode 100644
index 0000000..a3fa9d3
--- /dev/null
+++ b/binary_search.cpp
@@ -0,0 +1,21 @@
+int maxArea(vector<int>& height) {
+    int low = 0;
+    int high = height.size()-1;
+    int largest = 0;
+    while(low<high){
+        int breadth = high - low;
+    int length = min(height[low],height[high]);
+        int area = breadth*length;
+        if(area>largest){
+            largest = area;
+        }
+        if(height[low]>height[high]){
+            high--;
+        }
+        else{
+            low++;
+        }
+    }
+    return largest;
+}
+};