For problem statement at 1000-1999/1500-1599/1550-1559/1550/problemC.txt this is a correct solution, but verifier at 1000-1999/1500-1599/1550-1559/1550/verifierC.go ends with All tests passed can you fix the verifier? ```go
package main

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

func main() {
	reader := bufio.NewReader(os.Stdin)
	writer := bufio.NewWriter(os.Stdout)
	defer writer.Flush()

	var t int
	if _, err := fmt.Fscan(reader, &t); err != nil {
		return
	}

	for ; t > 0; t-- {
		var n int
		fmt.Fscan(reader, &n)
		a := make([]int, n)
		for i := 0; i < n; i++ {
			fmt.Fscan(reader, &a[i])
		}

		ans := 0
		for i := 0; i < n; i++ {
			// Subarrays of length 1 are always good
			ans++

			// Subarrays of length 2 are always good
			if i+1 < n {
				ans++
			}

			// Subarrays of length 3
			if i+2 < n {
				if !isBad(a[i], a[i+1], a[i+2]) {
					ans++
				}
			}

			// Subarrays of length 4
			if i+3 < n {
				// A subarray of length 4 is good if no 3 indices form a bad triple.
				// We check all 4 combinations of triples.
				if !isBad(a[i], a[i+1], a[i+2]) &&
					!isBad(a[i+1], a[i+2], a[i+3]) &&
					!isBad(a[i], a[i+1], a[i+3]) &&
					!isBad(a[i], a[i+2], a[i+3]) {
					ans++
				}
			}
			
			// Subarrays of length >= 5 always contain a monotonic subsequence of length 3
			// (Erdos-Szekeres theorem), which constitutes a bad triple. 
			// So no need to check length >= 5.
		}
		fmt.Fprintln(writer, ans)
	}
}

// isBad returns true if the points corresponding to values x, y, z (with indices i < j < k)
// form a bad triple. This happens if y is metrically between x and z, which for the given
// Manhattan distance definition simplifies to the sequence being monotonic.
func isBad(x, y, z int) bool {
	return (x <= y && y <= z) || (x >= y && y >= z)
}
```