update the leetcode problem

leetcode/p1051_heightchecker.cpp

@@ -0,0 +1,15 @@
+class Solution {
+public:
+    int heightChecker(vector<int>& heights) {
+        int count = 0;
+        int size = heights.size();
+        vector<int> expected(heights);
+        sort(expected.begin(),expected.end());
+        for(int i=0;i<size;i++){
+            if(heights[i]!=expected[i]){
+                count++;
+            }
+        }
+        return count;
+    }
+};