package main

import "fmt"
import "reflect"

type Swap struct {
	u, v int
}

func (s Swap) String() string {
	return fmt.Sprint(s.u, s.v)
}
func main() {
	var N int
	fmt.Scan(&N)
	A := make([]int, N)
	for i := range A {
		fmt.Scan(&A[i])
	}

	var sw []Swap

	preA := make([]int, N)
	for {
		if reflect.DeepEqual(preA, A) {
			break
		}
		copy(preA, A)
		for i := range A {
			if N <= i+2 {
				break
			}
			j := i + 1
			k := j + 1

			if (A[i] < A[j] && A[j] > A[k]) || (A[i] > A[j] && A[j] < A[k]) {
				sw = append(sw, Swap{j, k})
				A[j], A[k] = A[k], A[j]
			}
		}
	}

	fmt.Println(len(sw))
	for i := range sw {
		fmt.Println(sw[i])
	}

	var dummy int
	fmt.Scan(&dummy)
}