day7

Author: KB-perByte

.gitignore

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+.vscode/settings.json

Leetcode_30days/day7_CountingElements.py

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+'''Given an integer array arr, count element x such that x + 1 is also in arr.
+If there're duplicates in arr, count them seperately.'''
+
+class Solution(object):
+    def countElements(self, arr):
+        """
+        :type arr: List[int]
+        :rtype: int
+        """
+        count = 0
+        arr.sort()
+        for i in arr:
+            if i+1 in arr:
+                count+=1
+        return count
+