diff --git "a/suyeun84/202507/05 BOJ G4 \352\263\240\353\203\245\354\235\264.md" "b/suyeun84/202507/05 BOJ G4 \352\263\240\353\203\245\354\235\264.md"
new file mode 100644
index 00000000..e0e58f22
--- /dev/null
+++ "b/suyeun84/202507/05 BOJ G4 \352\263\240\353\203\245\354\235\264.md"	
@@ -0,0 +1,25 @@
+```java
+import java.io.*;
+
+public class boj16472 {
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+	public static void main(String[] args) throws Exception {
+		int N = Integer.parseInt(br.readLine());
+		String input = br.readLine();
+		int[] alpha = new int[26];
+		int cnt = 0, answer = 0, start = 0, end = -1;
+		
+		while (++end < input.length()) {
+            if (alpha[input.charAt(end) - 'a']++ == 0) cnt++;
+
+            while (N < cnt) {
+                if (--alpha[input.charAt(start++) - 'a'] == 0) cnt--;
+            }
+
+            answer = Math.max(answer, end - start + 1);
+        }
+        System.out.println(answer);
+	}
+}
+```