package main

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

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

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

	for i := 0; i < t; i++ {
		var n int
		fmt.Fscan(in, &n)

		pos := make([]int, n+1)
		for j := 1; j <= n; j++ {
			var x int
			fmt.Fscan(in, &x)
			pos[x] = j
		}

		l := (n + 1) / 2
		r := (n + 2) / 2

		if pos[l] > pos[r] {
			fmt.Fprintln(out, n/2)
			continue
		}

		for l > 1 && pos[l-1] < pos[l] && pos[r] < pos[r+1] {
			l--
			r++
		}
		fmt.Fprintln(out, l-1)
	}
}