For problem statement at 0-999/400-499/400-409/409/problemF.txt this is a correct solution, but verifier at verifier not found ends with test 2 failed: expected "2" got "3"

exit status 1 can you fix the verifier? ```go
package main

import "fmt"

func main() {
	var a uint64
	fmt.Scan(&a)
	res := ^uint64(0) >> (64 - a)
	fmt.Println(res)
}
```