[20251109] BOJ / G4 / 램프 / 이강현

lkhyun/202511/09 BOJ G4 램프.md

@@ -0,0 +1,39 @@
+```java
+import java.util.*;
+import java.io.*;
+
+public class Main{
+    static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    static StringBuilder sb = new StringBuilder();
+    static StringTokenizer st;
+    static int N,M,K;
+    static Map<String, Integer> patterns = new HashMap<>();
+    static int max = 0;
+
+    public static void main(String[] args) throws Exception {
+        st = new StringTokenizer(br.readLine());
+        N = Integer.parseInt(st.nextToken());
+        M = Integer.parseInt(st.nextToken());
+        for(int i = 0;i<N;i++){
+            String input = br.readLine();
+            patterns.put(input, patterns.getOrDefault(input, 0)+1);
+        }
+        K = Integer.parseInt(br.readLine());
+
+        for(String s : patterns.keySet()){
+            int zeroCnt = 0;
+            for(int i = 0; i<s.length(); i++){
+                if(s.charAt(i) == '0'){
+                    zeroCnt++;
+                }
+            }
+            if(zeroCnt <= K && (K-zeroCnt)%2 == 0){
+                max = Math.max(max,patterns.get(s));
+            }
+        }
+        bw.write(max+"");
+        bw.close();
+    }
+}
+```