Add problem 11 .

1 files changed, 42 insertions, 0 deletions

diff --git a/cpp/11.cpp b/cpp/11.cpp
new file mode 100644
index 0000000..44a8fd9
--- /dev/null
+++ b/cpp/11.cpp
@@ -0,0 +1,42 @@
+#include <vector>

+#include <algorithm>

+

+using std::vector;

+

+class Solution

+{

+public:

+    int maxArea(vector<int> &height)

+    {

+        auto left = height.cbegin();

+        auto right = height.cend();

+        --right;

+

+        int result = 0;

+

+        // although length could be calculated by right - left,

+        // but this can be cached in register.

+        int length = height.size() - 1;

+

+        while (left != right)

+        {

+            const int left_v = *left;

+            const int right_v = *right;

+            const int capacity = std::min(left_v, right_v) * length;

+            result = std::max(capacity, result);

+

+            if (left_v < right_v)

+            {

+                ++left;

+            }

+            else

+            {

+                --right;

+            }

+

+            length--;

+        }

+

+        return result;

+    }

+};