Create Solution.java

Author: Jerring

solution/1051.Height Checker/Solution.java

@@ -0,0 +1,13 @@
+class Solution {
+    public int heightChecker(int[] heights) {
+        int[] copy = Arrays.copyOf(heights, heights.length);
+        Arrays.sort(copy);
+        int res = 0;
+        for (int i = 0; i < heights.length; ++i) {
+            if (heights[i] != copy[i]) {
+                ++res;
+            }
+        }
+        return res;
+    }
+}