diff --git "a/LiiNi-coder/202510/20 PGM \354\235\264\354\247\204 \353\263\200\355\231\230 \353\260\230\353\263\265\355\225\230\352\270\260.md" "b/LiiNi-coder/202510/20 PGM \354\235\264\354\247\204 \353\263\200\355\231\230 \353\260\230\353\263\265\355\225\230\352\270\260.md"
new file mode 100644
index 00000000..89e36e93
--- /dev/null
+++ "b/LiiNi-coder/202510/20 PGM \354\235\264\354\247\204 \353\263\200\355\231\230 \353\260\230\353\263\265\355\225\230\352\270\260.md"	
@@ -0,0 +1,31 @@
+```java
+import java.util.*;
+
+class Solution {
+    public int[] solution(String s) {
+        int[] answer = new int[]{0, 0};
+        
+        while(!"1".equals(s)){
+            // 1개수 확인
+            int oneCount = 0;
+            for(int i = 0; i<s.length(); i++){
+                if(s.charAt(i) == '1')
+                    oneCount++;
+            }
+            answer[1] += s.length() - oneCount;
+            // 이진수 s에 대입
+            StringBuilder sb = new StringBuilder();
+            while(oneCount>1){
+                sb.append(Integer.toString(oneCount % 2));
+                oneCount /= 2;
+            }
+            sb.append(Integer.toString(oneCount));
+            sb.reverse();
+            s = sb.toString();
+            answer[0]++;
+        }
+        
+        return answer;
+    }
+}
+```