๋ฌธ์ (์ถ์ฒ: https://www.acmicpc.net/problem/29881) ๋ฌธ์ ํ์ด key : first name / value : last namekey : first name / value : account name์ ๊ฐ์ผ๋ก ๊ฐ์ง๋ HashMap์ ํ์ฉํ์ฌ last name๊ณผ account name์ ์ถ๋ ฅํ๋ค. my solution (Java)import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.OutputStreamWriter;import java.util.HashMap;import java.util.StringTokenizer;import java.io...
