For problem statement at 0-999/700-799/760-769/768/problemB.txt this is a correct solution, but verifier at 0-999/700-799/760-769/768/verifierB.go ends with All tests passed can you fix the verifier? ```go
package main

import (
	"fmt"
	"math/big"
)

var memo map[uint64]uint64

// countOnes returns the total number of 1s in the final list generated from n
func countOnes(n uint64) uint64 {
	if n == 0 {
		return 0
	}
	if n == 1 {
		return 1
	}
	if val, ok := memo[n]; ok {
		return val
	}
	result := 2*countOnes(n/2) + (n % 2)
	memo[n] = result
	return result
}

// length returns the length of the final list generated from n
var lengthMemo map[uint64]*big.Int

func length(n uint64) *big.Int {
	if n <= 1 {
		return big.NewInt(1)
	}
	if val, ok := lengthMemo[n]; ok {
		return val
	}
	// length(n) = 2*length(n/2) + 1
	half := length(n / 2)
	result := new(big.Int).Mul(half, big.NewInt(2))
	result.Add(result, big.NewInt(1))
	lengthMemo[n] = result
	return result
}

// countOnesInRange counts the number of 1s in positions [l, r] (1-indexed) of the list generated from n
// pos is the starting position of this node's list (1-indexed)
func countOnesInRange(n uint64, l, r *big.Int) uint64 {
	// The list for n has length len(n)
	// Structure: [list(n/2), n%2, list(n/2)]
	if n == 0 {
		return 0
	}
	if n == 1 {
		return 1
	}

	len_n := length(n)
	
	// Check if [l, r] covers entire range
	if l.Cmp(big.NewInt(1)) == 0 && r.Cmp(len_n) == 0 {
		return countOnes(n)
	}

	half := length(n / 2)
	// Middle element is at position half+1
	middlePos := new(big.Int).Add(half, big.NewInt(1))

	result := uint64(0)

	// Left subtree: positions 1 to half
	// We need intersection of [l, r] with [1, half]
	leftEnd := half
	lLeft := maxBig(l, big.NewInt(1))
	rLeft := minBig(r, leftEnd)
	if lLeft.Cmp(rLeft) <= 0 {
		result += countOnesInRange(n/2, lLeft, rLeft)
	}

	// Middle element at position middlePos
	if l.Cmp(middlePos) <= 0 && middlePos.Cmp(r) <= 0 {
		result += n % 2
	}

	// Right subtree: positions middlePos+1 to len_n
	// corresponds to positions 1 to half in n/2's list
	rightStart := new(big.Int).Add(middlePos, big.NewInt(1))
	lRight := maxBig(l, rightStart)
	rRight := minBig(r, len_n)
	if lRight.Cmp(rRight) <= 0 {
		// Convert to local positions in n/2's list
		offset := new(big.Int).Sub(rightStart, big.NewInt(1))
		lLocal := new(big.Int).Sub(lRight, offset)
		rLocal := new(big.Int).Sub(rRight, offset)
		result += countOnesInRange(n/2, lLocal, rLocal)
	}

	return result
}

func maxBig(a, b *big.Int) *big.Int {
	if a.Cmp(b) >= 0 {
		return a
	}
	return b
}

func minBig(a, b *big.Int) *big.Int {
	if a.Cmp(b) <= 0 {
		return a
	}
	return b
}

func main() {
	var n uint64
	var l, r int64
	fmt.Scan(&n, &l, &r)

	memo = make(map[uint64]uint64)
	lengthMemo = make(map[uint64]*big.Int)

	lBig := big.NewInt(l)
	rBig := big.NewInt(r)

	result := countOnesInRange(n, lBig, rBig)
	fmt.Println(result)
}
```