Add problem 1051.

1 files changed, 33 insertions, 0 deletions

diff --git a/cpp/1051.cpp b/cpp/1051.cpp
new file mode 100644
index 0000000..e55d877
--- /dev/null
+++ b/cpp/1051.cpp
@@ -0,0 +1,33 @@
+#include <vector>
+
+using std::vector;
+
+class Solution
+{
+public:
+    int heightChecker(vector<int> &heights)
+    {
+        vector<int> height_counter(101);
+        for (int height : heights)
+        {
+            height_counter[height]++;
+        }
+
+        auto iter = heights.cbegin();
+
+        int result = 0;
+
+        for (int height = 1; height <= 100; height++)
+        {
+            int height_count = height_counter[height];
+            while (height_count > 0)
+            {
+                if (*iter++ != height)
+                    result++;
+                --height_count;
+            }
+        }
+
+        return result;
+    }
+};
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