From aa6617eda20af145699894fbc588f9bdec1874a5 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tk@the-tk.com>
Date: Sat, 4 Dec 2021 13:34:59 +0000
Subject: day 4: replace loops with list.index

---
 4.py | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/4.py b/4.py
index 41dc053..ca63510 100644
--- a/4.py
+++ b/4.py
@@ -1,4 +1,4 @@
-from itertools import product, chain
+from itertools import chain
 from utils import open_day
 
 class Board:
@@ -21,17 +21,17 @@ class Board:
             self.cells.append(cell)
         self.has_bingo = False
     def call(self, num: int):
-        for y, x in product(range(self.height), range(self.width)):
-            cell = self.cells[x + self.width * y]
-            if cell == num:
-                self.col_hits[x] += 1
-                self.row_hits[y] += 1
-                self.unmarked_sum -= cell
-                self.has_bingo = (
-                    any(hits == self.height for hits in self.col_hits) or
-                    any(hits == self.width for hits in self.row_hits)
-                )
-                return
+        try:
+            pos: int = self.cells.index(num)
+            self.col_hits[pos // self.width] += 1
+            self.row_hits[pos // self.height] += 1
+            self.unmarked_sum -= num
+            self.has_bingo = (
+                any(hits == self.height for hits in self.col_hits) or
+                any(hits == self.width for hits in self.row_hits)
+            )
+        except ValueError:
+            pass
     @staticmethod
     def from_string(s: str) -> 'Board':
         return Board([[int(n) for n in l.split()] for l in s.split('\n')])
-- 
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