diff --git a/programmers/예상 대진표/solution.java b/programmers/예상 대진표/solution.java
index 66af5f9..24479ed 100644
--- a/programmers/예상 대진표/solution.java	
+++ b/programmers/예상 대진표/solution.java	
@@ -1,24 +1,7 @@
 // [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/12985
 
-class Solution
-{
-    static double baseLog(double x, double base) {
-        return Math.log10(x) / Math.log10(base);
-    }
-    private int next(int a){
-        return (a+1)/2;
-    }
-    public int solution(int n, int a, int b)
-    {
-        int answer = 0;
-        System.out.println(a+" "+b);
-        for(int c = 1; c<= baseLog(n,2); c++){
-            answer = c;
-            System.out.println(a+" "+b);
-            if((int)Math.abs(a-b)==1 && Math.min(a,b)%2==1) break;
-            a = next(a);
-            b = next(b);
-        }
-        return answer;
+class Solution{
+    public int solution(int n, int a, int b){
+        return Integer.toBinaryString((a-1)^(b-1)).length();
     }
 }
\ No newline at end of file