using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        string[] input = new string[] { "16-18 h: hhhhhhhhhhhhhhhhhh"};

        Console.WriteLine(TotalValidPolicies(input));

    }

    private static int TotalValidPolicies(string[] input) {

        var validCounter = 0;

        foreach(var str in input) {

            var splitItems = str.Split(new char[] {' ', ':', '-'}, StringSplitOptions.RemoveEmptyEntries);

            var min =  Int32.Parse(splitItems[0]);

            var max = Int32.Parse(splitItems[1]);

            var target = (char) splitItems[2];

            var checkThis = splitItems[3];

            var counter = 0;

            for (int i = 0; i < checkThis.Length; i++) {

                if (checkThis[i] == target) {

                    counter++;

                }

                if (counter > max) {

                    break;

                }

            }

            if (counter >= min && counter <= max) {

                validCounter++;

            }

        }

        return validCounter;

    }

}

​