fun main() {
    val n = readLine()!!.toInt()
    val a = readLine()!!.split(" ").map { it.toInt() }

    val bit = Bit(n+1)
    var ans = 0
    for ((i, ai) in a.withIndex()) {
        if (i - bit.sum(ai) > 0) ans++
        bit.add(ai)
    }
    println(ans)
}

data class Bit(private val n : Int) {
    private val bit = Array(n+1) { 0 }

    fun add(i : Int) {
        var index = i + 1
        while (index <= n) {
            bit[index] += 1
            index += index and -index
        }
    }

    fun sum(i : Int): Int {
        var res = 0
        var index = i + 1
        while (index > 0) {
            res += bit[index]
            index -= index and -index
        }
        return res
    }
}