For problem statement at 1000-1999/1300-1399/1310-1319/1312/problemE.txt this is a correct solution, but verifier at 1000-1999/1300-1399/1310-1319/1312/verifierE.go ends with All 100 tests passed can you fix the verifier? ```go
package main

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

func main() {
	reader := bufio.NewReader(os.Stdin)
	var n int
	if _, err := fmt.Fscan(reader, &n); err != nil {
		return
	}
	a := make([]int, n)
	for i := 0; i < n; i++ {
		fmt.Fscan(reader, &a[i])
	}

	dp := make([][]int, n)
	for i := 0; i < n; i++ {
		dp[i] = make([]int, n)
		for j := 0; j < n; j++ {
			dp[i][j] = -1
		}
		dp[i][i] = a[i]
	}

	for L := 2; L <= n; L++ {
		for i := 0; i <= n-L; i++ {
			j := i + L - 1
			for k := i; k < j; k++ {
				if dp[i][k] != -1 && dp[i][k] == dp[k+1][j] {
					dp[i][j] = dp[i][k] + 1
					break
				}
			}
		}
	}

	minLen := make([]int, n+1)
	for i := 1; i <= n; i++ {
		minLen[i] = 1e9
	}
	minLen[0] = 0

	for i := 1; i <= n; i++ {
		for j := 1; j <= i; j++ {
			if dp[j-1][i-1] != -1 {
				if minLen[j-1]+1 < minLen[i] {
					minLen[i] = minLen[j-1] + 1
				}
			}
		}
	}

	fmt.Println(minLen[n])
}
```