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 C# (Mono 4.6.2.0) (judge verdict: Runtime Error)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Contest_01_Valeo_P5
{
    class Program
    {

        static void Main(string[] args)
        {
            while (true)
            {
                Console.WriteLine("start problem");
                string input = Console.ReadLine();
                long n = long.Parse(input.Split(' ')[0]);
                input = Console.ReadLine();

                string[] a_string = input.Split(' ');
                List<long> p = new List<long>();
                a_string.ToList().ForEach(x => p.Add(long.Parse(x)));
                long result = getNumberOfIntegers(n, p);
                Console.WriteLine(result);
                Console.Write("press y to exit : ");
                if (Console.ReadLine() == "y")
                    return;
            }
        }

        /// <summary>
        /// in session 
        /// </summary>
        /// <param name="n"></param>
        /// <param name="p"></param>
        /// <returns></returns>
        private static long getNumberOfIntegers(long n, List<long> p)
        {
            long count = 1;
            long minimum = p[0];
            for (int i = 1; i < p.Count; i++)
            {
                if(p[i] < minimum)
                {
                    minimum = p[i];
                    count++;
                }
            }
            return count;
        }
        
    }
}