diff --git a/puzzles/day03.py b/puzzles/day03.py
index f2675e6..e920ede 100644
--- a/puzzles/day03.py
+++ b/puzzles/day03.py
@@ -12,18 +12,16 @@ from typing import Dict, List, Tuple
 from collections import defaultdict
 
 class Diagnostics:
-    _most_common = None
     report = None
 
     def __init__(self, report: List[int]) -> None:
         self.report = report
-        self._most_common = self.commonality(report)
 
 
     def power_usage(self) -> None:
-        half_count = len(self.report)/2
+        most_common = self.commonality(self.report)
         gamma = epsilon = ""
-        for common in self._most_common:
+        for common in most_common:
             if common == 1:
                 gamma += "1"
                 epsilon += "0"