diff --git "a/4st/Eunseong/\354\230\210\354\203\201 \353\214\200\354\247\204\355\221\234.java" "b/4st/Eunseong/\354\230\210\354\203\201 \353\214\200\354\247\204\355\221\234.java"
new file mode 100644
index 00000000..69001ab6
--- /dev/null
+++ "b/4st/Eunseong/\354\230\210\354\203\201 \353\214\200\354\247\204\355\221\234.java"	
@@ -0,0 +1,16 @@
+class Solution {
+    public int solution(int n, int a, int b) {
+        int answer = 1;
+        while (true) {
+            if (Math.abs(a - b) == 1) {
+                if ((a > b && a % 2 == 0) || (b > a && b % 2 == 0)) {
+                    break;
+                }
+            }
+            a = (int)Math.ceil((double)a / 2);
+            b = (int)Math.ceil((double)b / 2);
+            answer++;
+        }
+        return answer;
+    }
+}
\ No newline at end of file