Problem:
Score : 300 points

Problem Statement

Given is a permutation P_1, \ldots, P_N of 1, \ldots, N.
Find the number of integers i (1 \leq i \leq N) that satisfy the following condition:

For any integer j (1 \leq j \leq i), P_i \leq P_j.

Constraints

1 \leq N \leq 2 \times 10^5

P_1, \ldots, P_N is a permutation of 1, \ldots, N.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

N
P_1 ... P_N

Output

Print the number of integers i that satisfy the condition.

Sample Input 1

5
4 2 5 1 3

Sample Output 1

3

i=1, 2, and 4 satisfy the condition, but i=3 does not - for example, P_i > P_j holds for j = 1.

Similarly, i=5 does not satisfy the condition, either. Thus, there are three integers that satisfy the condition.

Sample Input 2

4
4 3 2 1

Sample Output 2

4

All integers i (1 \leq i \leq N) satisfy the condition.

Sample Input 3

6
1 2 3 4 5 6

Sample Output 3

1

Only i=1 satisfies the condition.

Sample Input 4

8
5 7 4 2 6 8 1 3

Sample Output 4

4

Sample Input 5

1
1

Sample Output 5

1

Solution in Go (1.6) (judge verdict: Runtime Error)

package main

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

func main() {
	run()
}

func run() {
	n := readN()
	setSpace()

	as := make([]int, n)
	for i := 0; i < n; i++ {
		as[i] = readN()
	}
	min := as[0]
	cnt := 1

	for _, a := range as {
		if min > a {
			cnt++
			min = a
		}
	}
	fmt.Println(cnt)
}

// ------以下、ユーティリティ------

var sc = bufio.NewScanner(os.Stdin)

func setSpace() {
	sc.Split(bufio.ScanWords)
}

func read() string {
	sc.Scan()
	return sc.Text()
}

func readN() int {
	n, err := strconv.Atoi(read())
	if err != nil {
		panic(err)
	}
	return n
}