HackerRankinaString!.cs

using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text.RegularExpressions;
using System.Text;
using System;

class Solution {

    // Complete the hackerrankInString function below.
    static string hackerrankInString(string s) {
        var textToSearch = "hackerrank";
        int currentPos = 0, i = 0;
        while (i < s.Length && currentPos != textToSearch.Length)
        {
            if (textToSearch[currentPos] == s[i])
            {
                currentPos++;
            }
            i++;
        }

        return currentPos == textToSearch.Length ? "YES" : "NO";

    }

    static void Main(string[] args) {
        TextWriter textWriter = new StreamWriter(@System.Environment.GetEnvironmentVariable("OUTPUT_PATH"), true);

        int q = Convert.ToInt32(Console.ReadLine());

        for (int qItr = 0; qItr < q; qItr++) {
            string s = Console.ReadLine();

            string result = hackerrankInString(s);

            textWriter.WriteLine(result);
        }

        textWriter.Flush();
        textWriter.Close();
    }
}