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E. Mahmoud and Ehab and the xor-MST

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputEhab is interested in the bitwise-xor operation and the special graphs. Mahmoud gave him a problem that combines both. He has a complete graph consisting of *n* vertices numbered from 0 to *n* - 1. For all 0 ≤ *u* < *v* < *n*, vertex *u* and vertex *v* are connected with an undirected edge that has weight (where is the bitwise-xor operation). Can you find the weight of the minimum spanning tree of that graph?

You can read about complete graphs in https://en.wikipedia.org/wiki/Complete_graph

You can read about the minimum spanning tree in https://en.wikipedia.org/wiki/Minimum_spanning_tree

The weight of the minimum spanning tree is the sum of the weights on the edges included in it.

Input

The only line contains an integer *n* (2 ≤ *n* ≤ 10^{12}), the number of vertices in the graph.

Output

The only line contains an integer *x*, the weight of the graph's minimum spanning tree.

Example

Input

4

Output

4

Note

In the first sample: The weight of the minimum spanning tree is 1+2+1=4.

Codeforces (c) Copyright 2010-2018 Mike Mirzayanov

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