[ BOJ/C# ] 1764 듣보잡

https://www.acmicpc.net/problem/1764

1764번: 듣보잡

 

a.Intersect(b); a와 b의 교집합을 구한다

Enumerable.ToList(c); Enumerable을 List로 바꿔준다. 

using System;
using System.Diagnostics;

namespace _1764
{
    namespace Program
    {
        class Program
        {
            static void Main()
            {
                StreamReader sr = new StreamReader(Console.OpenStandardInput());
                StreamWriter sw = new StreamWriter(Console.OpenStandardOutput());

                string[] str = sr.ReadLine().Split(' ');
                int n = int.Parse(str[0]);
                int m = int.Parse(str[1]);

                List<string> nameN = new List<string>();
                List<string> nameM = new List<string>();

                for (int i = 0; i < n; i++) nameN.Add(sr.ReadLine());
                for (int i = 0; i < m; i++) nameM.Add(sr.ReadLine());

                var result = Enumerable.ToList(nameN.Intersect(nameM));
                result.Sort();
                sw.WriteLine(result.Count());
                for (int i = 0; i < result.Count(); i++) sw.WriteLine(result[i]);

                sr.Close();
                sw.Flush();
                sw.Close();
            }
        }
    }
}

https://learn.microsoft.com/ko-kr/dotnet/api/system.linq.enumerable.intersect?view=net-7.0 

Enumerable.Intersect 메서드 (System.Linq)

https://learn.microsoft.com/ko-kr/dotnet/api/system.linq.enumerable.tolist?view=net-7.0 

Enumerable.ToList<TSource>(IEnumerable<TSource>) 메서드 (System.Linq)