using System;

using System.Collections.Generic;

​

public class ScoreLookup {

    private Dictionary <string,int> dict = new Dictionary <string,int>();

    private int key_result = 0 ; 

    private int difference_of_Score = 0 ;

    private int min = 1000;

    public void AddScore(string name, int score) {

        if (!dict.ContainsKey(name))

            dict.Add(name,score);

    }

    public bool CheckPass (string name, int passScore) {

            foreach(KeyValuePair<string, int> pair in dict)

            if (pair.Key == name)

                  if( pair.Value >= passScore)

                     return true;

        return false;   

    }

    public int GetLowestPassScore(int passScore) {

        Dictionary<string, int>.KeyCollection keys = dict.Keys;

        foreach (string key in keys){

        dict.TryGetValue("key", out key_result);

            Console.Write("{0} ",key_result);

            if(key_result < min && key_result >= passScore)

                min = key_result;

        }

            Console.WriteLine();

        if(min >= passScore)

        return min;

            else

                return 0;

    }

}

public class Program

{

    public static void Main()

    {

        ScoreLookup lookup = new ScoreLookup();

        lookup.AddScore("John", 40);

        lookup.AddScore("Henry", 0);

        lookup.AddScore("Mary", 59);

        lookup.AddScore("Hillary",39);

        lookup.AddScore("Pikachu", 100);

        Console.WriteLine(lookup.CheckPass("John", 40));

        Console.WriteLine(lookup.CheckPass("Mary", 60));

        Console.WriteLine(lookup.CheckPass("Pikachu", 40));

        Console.WriteLine(lookup.CheckPass("William", 40));

        Console.WriteLine(lookup.CheckPass("Hillary", 40));

        Console.WriteLine(lookup.GetLowestPassScore(50));

    }

}

​

​