```go
package main

import "fmt"

func main() {
	var n int64
	fmt.Scan(&n)
	m := n - 1
	var sum int64 = 0
	for k := 0; k <= 40; k++ {
		p := int64(1) << uint(k)
		cnt := m / p - m / (p * 2)
		sum += cnt * p
	}
	fmt.Println(sum)
}
```