[20251112] BOJ / G3 / 알 수 없는 문장 / 이종환

Author: 0224LJH

0224LJH/202511/12 BOJ 알 수 없는 문장.md

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+```java
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.*;
+import java.util.*;
+
+public class Main {
+	
+	
+	static char[] arr;
+	static int[] dp;
+	static int cnt,ans,len;
+	
+	static final int CHAR_LEN = 'z'-'a'+1;
+	static final int MAX = Integer.MAX_VALUE/2;
+	static final int X = -1;
+	
+	static HashSet<Word> words = new HashSet<>();
+	
+	static class Word{
+		//각 알파벳 몇번 사용했는지 카운트
+		int[] count = new int[CHAR_LEN];
+		char[] content;
+		
+		public Word(String w) {
+			content = w.toCharArray();
+			for (int i = 0; i < content.length; i++) {
+				count[content[i]-'a']++;
+			}
+		}
+		
+		public int getCost(int idx) {
+			int end = idx+ content.length;
+			if (arr.length < end) {
+				return X;
+			}
+			
+			int[] targetCnt = new int[CHAR_LEN];
+			for (int i = idx; i < end; i++) {
+				targetCnt[arr[i]-'a']++;
+			}
+			
+			for (int i = 0; i< CHAR_LEN; i++) {
+				if (targetCnt[i] != count[i]) return X;
+			}
+			
+			int cost = 0;
+			
+			for (int i = 0; i < content.length; i++) {
+				if (arr[i+idx] != content[i])cost++;
+			}
+			
+			
+			
+			return cost;
+		}
+		
+	}
+	
+			
+	public static void main (String[] args) throws NumberFormatException, IOException {
+		init();
+
+		process();
+		print();
+
+	}
+	
+	public static void init() throws IOException {
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		arr = br.readLine().toCharArray();
+		cnt = Integer.parseInt(br.readLine());
+		ans = MAX;
+		len = arr.length;
+		dp = new int[len+1];
+		
+		
+		Arrays.fill(dp,MAX);
+		dp[0] = 0;
+		
+		for (int i = 0; i < cnt; i++) {
+			String word = br.readLine();
+			words.add(new Word(word));
+		}
+		
+	}
+	
+	public static void process() {
+		for (int i = 0; i < len; i++) {
+			for (Word w: words) {
+				int cost = w.getCost(i);
+				if (cost == X) continue;
+				
+				dp[i+w.content.length] = Math.min(dp[i+w.content.length], dp[i]+cost);
+			}
+		}
+	}
+	
+	public static void print() {
+		System.out.println(dp[len]==MAX?-1:dp[len]);
+	}
+
+}
+
+```