From f27eff39a11e03f32bb93a7a3a2232ab9c439a32 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tomasz@kramkow.ski>
Date: Sun, 18 Dec 2022 13:16:19 +0000
Subject: 10 use a generator and inline some things

---
 10.py | 50 +++++++++++++++++++++++---------------------------
 1 file changed, 23 insertions(+), 27 deletions(-)

diff --git a/10.py b/10.py
index 27dbde9..e983650 100644
--- a/10.py
+++ b/10.py
@@ -8,35 +8,31 @@ class Cycle:
 class Change:
     diff: int
 
-instrs = []
-with open('10.in') as f:
+def instr_gen(f):
     for line in f:
         match line.rstrip().split():
             case ['addx', n]:
-                instrs.append(Cycle())
-                instrs.append(Cycle())
-                instrs.append(Change(int(n)))
+                yield Cycle()
+                yield Cycle()
+                yield Change(int(n))
             case ['noop']:
-                instrs.append(Cycle())
+                yield Cycle()
 
-cycle = 0
-sigstr = 0
-X = 1
-screen = [0 for _ in range(240)]
-for instr in instrs:
-    match instr:
-        case Cycle():
-            cycle += 1
-            if (cycle - 20) % 40 == 0:
-                sigstr += cycle * X
-            xpos = (cycle - 1) % 40
-            if xpos - 1 <= X <= xpos + 1:
-                screen[cycle - 1] = 1
-        case Change(diff):
-            X += diff
-print(sigstr)
-for y in range(6):
-    line = []
-    for x in range(40):
-        line.append('#' if screen[x + 40 * y] else ' ')
-    print(''.join(line))
+with open('10.in') as f:
+    cycle = 0
+    signal_strength = 0
+    X = 1
+    screen = []
+    for instr in instr_gen(f):
+        match instr:
+            case Cycle():
+                cycle += 1
+                if (cycle - 20) % 40 == 0:
+                    signal_strength += cycle * X
+                xpos = (cycle - 1) % 40
+                screen.append('#' if xpos - 1 <= X <= xpos + 1 else ' ')
+                if xpos == 39: screen.append('\n')
+            case Change(diff):
+                X += diff
+print(signal_strength)
+print(''.join(screen), end='')
-- 
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