diff --git a/khj20006/202506/20 BOJ P4 blobfearful.md b/khj20006/202506/20 BOJ P4 blobfearful.md
new file mode 100644
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+++ b/khj20006/202506/20 BOJ P4 blobfearful.md	
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+```java
+import java.math.BigInteger;
+import java.util.*;
+import java.io.*;
+
+class IOController {
+    BufferedReader br;
+    BufferedWriter bw;
+    StringTokenizer st;
+
+    public IOController() {
+        br = new BufferedReader(new InputStreamReader(System.in));
+        bw = new BufferedWriter(new OutputStreamWriter(System.out));
+        st = new StringTokenizer("");
+    }
+
+    String nextLine() throws Exception {
+        String line = br.readLine();
+        st = new StringTokenizer(line);
+        return line;
+    }
+
+    String nextToken() throws Exception {
+        while (!st.hasMoreTokens()) nextLine();
+        return st.nextToken();
+    }
+
+    int nextInt() throws Exception {
+        return Integer.parseInt(nextToken());
+    }
+
+    long nextLong() throws Exception {
+        return Long.parseLong(nextToken());
+    }
+
+    double nextDouble() throws Exception {
+        return Double.parseDouble(nextToken());
+    }
+
+    void close() throws Exception {
+        bw.flush();
+        bw.close();
+    }
+
+    void write(String content) throws Exception {
+        bw.write(content);
+    }
+
+}
+
+public class Main {
+
+    static IOController io;
+
+    //
+
+    static long K, Q;
+    static HashMap<Long, Integer> M;
+
+    public static void main(String[] args) throws Exception {
+
+        io = new IOController();
+
+        init();
+        solve();
+
+        io.close();
+
+    }
+
+    public static void init() throws Exception {
+
+        K = io.nextLong();
+        Q = io.nextInt();
+        M = new HashMap<>();
+
+    }
+
+    static void solve() throws Exception {
+
+        for(long k=2;k*k<=K;k++) if(K%k == 0) {
+            int cnt = 0;
+            while(K%k == 0){
+                K/=k;
+                cnt++;
+            }
+            M.put(k, cnt);
+        }
+        if(K != 1) M.put(K, 1);
+
+        while(Q-->0) {
+            long a = io.nextLong();
+            long ans = 0;
+            for(long i:M.keySet()) {
+                long temp = a;
+                int cnt = 0;
+                while(temp%i == 0){
+                    temp /= i;
+                    cnt++;
+                }
+                cnt = Math.max(0, M.get(i) - cnt);
+                long res = 0, count = 0;
+                while(count < cnt) {
+                    res += i;
+                    for(long j = i;j<=res;j*=i) if(res % j == 0) count++;
+                }
+                ans = Math.max(ans, res);
+            }
+            io.write(ans + " ");
+        }
+
+    }
+
+}
+```