Submission #1222170

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Source Code Expand

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
class Program
{
    public static int ans;
    public static int n;
    public static int[] a;
    static void Main(string[] args)
    {
        ans = 1;
        n = int.Parse(Console.ReadLine());
        a = Console.ReadLine().Split().Select(int.Parse).ToArray();
        int[] b=new int[n-1];
        for (int i = 0; i < n-1; i++)
        {
            if (a[i] < a[i + 1]) b[i] = 0;
            if (a[i] == a[i + 1]) b[i] = 1;
            if (a[i] > a[i + 1]) b[i] = 2;
        }
        for (int j = 0; j < n-2; j++)
        {
            if (b[j] + 2 == b[j + 1] || b[j] == b[j + 1] + 2) ans++;
            if(j>0)
            {
                if (b[j] + 2 == b[j + 1] && b[j] + 2 == b[j - 1]) ans--;
            }
        }
        Console.WriteLine(ans.ToString());
    }
    
}

Submission Info

Judge Result