For problem statement at 1000-1999/1100-1199/1140-1149/1140/problemE.txt this is a correct solution, but verifier at 1000-1999/1100-1199/1140-1149/1140/verifierE.go ends with All tests passed can you fix the verifier? ```go
package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func power(base, exp int64) int64 {
	res := int64(1)
	base %= 998244353
	for exp > 0 {
		if exp%2 == 1 {
			res = (res * base) % 998244353
		}
		base = (base * base) % 998244353
		exp /= 2
	}
	return res
}

func solve1D(b []int, k int, A []int64, B []int64) int64 {
	m := len(b)
	if m == 0 {
		return 1
	}

	first := -1
	last := -1
	for i := 0; i < m; i++ {
		if b[i] != -1 {
			if first == -1 {
				first = i
			}
			last = i
		}
	}

	if first == -1 {
		ans := int64(k) % 998244353
		kMinus1 := (int64(k) - 1 + 998244353) % 998244353
		ans = (ans * power(kMinus1, int64(m-1))) % 998244353
		return ans
	}

	ans := int64(1)
	kMinus1 := (int64(k) - 1 + 998244353) % 998244353
	ans = (ans * power(kMinus1, int64(first))) % 998244353
	ans = (ans * power(kMinus1, int64(m-1-last))) % 998244353

	prev := first
	for i := first + 1; i <= last; i++ {
		if b[i] != -1 {
			gap := i - prev - 1
			if b[prev] == b[i] {
				ans = (ans * A[gap+2]) % 998244353
			} else {
				ans = (ans * B[gap+2]) % 998244353
			}
			prev = i
		}
	}
	return ans
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanWords)
	buf := make([]byte, 1024*1024*10)
	scanner.Buffer(buf, 1024*1024*10)

	if !scanner.Scan() {
		return
	}
	n, _ := strconv.Atoi(scanner.Text())

	if !scanner.Scan() {
		return
	}
	k, _ := strconv.Atoi(scanner.Text())

	a := make([]int, n)
	for i := 0; i < n; i++ {
		scanner.Scan()
		a[i], _ = strconv.Atoi(scanner.Text())
	}

	A := make([]int64, n+3)
	B := make([]int64, n+3)
	A[1] = 1
	B[1] = 0
	kMinus2 := (int64(k) - 2 + 998244353) % 998244353
	kMinus1 := (int64(k) - 1 + 998244353) % 998244353

	for i := 2; i <= n+2; i++ {
		A[i] = (kMinus1 * B[i-1]) % 998244353
		B[i] = (A[i-1] + kMinus2*B[i-1]) % 998244353
	}

	AOdd := make([]int, 0, (n+1)/2)
	AEven := make([]int, 0, n/2)
	for i := 0; i < n; i++ {
		if i%2 == 0 {
			AOdd = append(AOdd, a[i])
		} else {
			AEven = append(AEven, a[i])
		}
	}

	ans1 := solve1D(AOdd, k, A, B)
	ans2 := solve1D(AEven, k, A, B)
	finalAns := (ans1 * ans2) % 998244353

	fmt.Println(finalAns)
}
```