1 files changed, 29 insertions, 0 deletions
diff --git a/store/works/solutions/leetcode/cpp/que-shi-de-shu-zi-lcof.cpp b/store/works/solutions/leetcode/cpp/que-shi-de-shu-zi-lcof.cpp
new file mode 100644
index 0000000..1cb3e01
--- /dev/null
+++ b/store/works/solutions/leetcode/cpp/que-shi-de-shu-zi-lcof.cpp
@@ -0,0 +1,29 @@
+#include <vector>
+
+using std::vector;
+
+class Solution
+{
+public:
+    int missingNumber(vector<int> &nums)
+    {
+        if (nums.back() == nums.size() - 1)
+            return nums.size();
+
+        int low = 0, high = nums.size() - 1;
+        while (low != high)
+        {
+            int middle = (low + high) / 2;
+            if (middle == nums[middle])
+            {
+                low = middle + 1;
+            }
+            else
+            {
+                high = middle;
+            }
+        }
+
+        return low;
+    }
+};