코딩테스트 입문 문제 풀이

using System;

public class Solution {
    public string solution(string my_string, string letter) {
        string answer = "";
        //https://suncrystalpower.tistory.com/entry/%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4-C-%ED%8A%B9%EC%A0%95-%EB%AC%B8%EC%9E%90-%EC%A0%9C%EA%B1%B0%ED%95%98%EA%B8%B0
        string[] arr = my_string.Split(letter);
        
        for(int i = 0; i < arr.Length; i++)
        {
            answer += arr[i];
        }
        
        return answer;
    }
}

using System;

public class Solution 
{
    public int solution(int n, int k) 
    {
        int solution = 12000 * n + 2000 * k - n / 10 * 2000 ;
        return solution;
    }
}

using System;

public class Solution {
    public int solution(int n) {
        int answer = 0;
        for (int i = 2; i <= n; i += 2) 
        {
            if(i % 2 == 0)
            {
                answer += i;
            }
        }
        return answer;
    }
}