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[Baekjoon] 21208_Gratitude

๋ฌธ์ œ(์ถœ์ฒ˜: https://www.acmicpc.net/problem/21208) ๋ฌธ์ œ ํ’€์ด  HashMap์„ ์‚ฌ์šฉํ•˜์—ฌ ๊ฐ item์˜ ๋นˆ๋„์ˆ˜์™€ ๋“ฑ์žฅ ์ˆœ์„œ๋ฅผ ์ €์žฅํ•œ๋‹ค. item ๋นˆ๋„์ˆ˜ ๋‚ด๋ฆผ์ฐจ์ˆœ, ๋“ฑ์žฅ ์ˆœ์„œ ๋‚ด๋ฆผ์ฐจ์ˆœ์œผ๋กœ ์ •๋ ฌํ•˜์—ฌ K๊ฐœ๋ฅผ ์ถœ๋ ฅํ•œ๋‹ค.   my solution (Java)import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.util.ArrayList;import java.util.Collections;import java.util.HashMap;import ..
๐ŸŒžAlgorithm/๐Ÿ”ฅBaekjoon 2024.12.20
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