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 Java8 (OpenJDK 1.8.0) (judge verdict: Time Limit Exceeded)

import java.util.*;

public class Main {

    static int MOD = 1000000007;
    public static void main(String[] args) {

        int ans=0;
        Scanner sc = new Scanner(System.in);
        int n=sc.nextInt();

        int[] p = new int[n];
        HashSet<Integer> ff = new HashSet<>();

        for(int i=0;i<n;i++)p[i]=sc.nextInt();

        for(int i=0;i<n;i++){
            boolean ok=true;

            for(int j=0;j<i;j++){
                if(p[i]<p[i-1]&&ff.contains(i))break;
                if(p[i]>p[j]){
                    ok=false;
                    break;
                }

            }
            if(ok){
                ans++;
                ff.add(i);
            }
        }


        System.out.println(ans);

    }

}