Merge pull request #1871 from AlgorithmWithGod/Ukj0ng

[20260202] BOJ / G3 / 크리스 마틴 / 한종욱

Author: ShinHeeEul

Ukj0ng/202602/02 BOJ G3 크리스 마틴.md

@@ -0,0 +1,47 @@
+```
+import java.io.*;
+import java.util.*;
+
+public class Main {
+    private static final BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+    private static Map<Character, Integer> map;
+    private static char answer;
+    private static int N, count;
+
+    public static void main(String[] args) throws IOException {
+        init();
+
+        bw.write(count + "\n");
+        for (int i = 0; i < N; i++) {
+            bw.write(answer + "");
+        }
+        bw.flush();
+        bw.close();
+        br.close();
+    }
+
+    private static void init() throws IOException {
+        N = Integer.parseInt(br.readLine());
+        count = N;
+        char[] input = br.readLine().toCharArray();
+
+        map = new HashMap<>();
+
+        map.put('A', 0);
+        map.put('C', 0);
+        map.put('G', 0);
+        map.put('T', 0);
+        for (int i = 0; i < N; i++) {
+            map.put(input[i], map.get(input[i])+1);
+        }
+
+        for (char key : map.keySet()) {
+            if (count > map.get(key)) {
+                count = map.get(key);
+                answer = key;
+            }
+        }
+    }
+}
+```