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Exclusive or

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 1023    Accepted Submission(s): 370


Problem Description
Given n, find the value of


Note: ¨’ denotes bitwise exclusive-or.
 

Input
The input consists of several tests. For each tests:

A single integer n (2ˇÜn<10500).
 

Output
For each tests:

A single integer, the value of the sum.
 

Sample Input
3
4
 

Sample Output
6
4
 

Author
Xiaoxu Guo (ftiasch)
 

Source
2014 Multi-University Training Contest 5
 

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