Added 2025 day2

2025-12-02 17:17:32 +01:00
parent 41339fdc15
commit e9a16e13bb
1 changed files with 103 additions and 0 deletions
@@ -0,0 +1,103 @@
+#!/bin/python3
+import sys,time,re,os
+from pprint import pprint
+sys.path.insert(0, '../../')
+from fred import list2int,get_re,nprint,lprint,loadFile
+start_time = time.time()
+
+if sys.argv[1] == 'test':
+    input_f = 'test'
+elif sys.argv[1] == 'input':
+    input_f = 'input'
+else:
+    print('No argv provided')
+    exit()
+
+def loadList(input_f):
+    lines = []
+    with open(input_f) as file:
+        for line in file:
+            lines.append(line.rstrip().split(','))  # Removes trailing newline from each line
+    return lines[0]
+
+#########################################
+#                                       #
+#              Part 1                   #
+#                                       #
+#########################################
+def part1():
+
+    arr = loadList(input_f)
+    score = 0
+    for a in arr:
+        nums = list2int(re.split(r'-',a))
+        for x in range(nums[0],nums[1]+1):
+            if len(str(x)) % 2 == 0:
+                val = re.fullmatch(r'^(.+)\1$',str(x))
+                if val != None:
+                    score += int(val.group(0))
+    return score
+
+
+    
+start_time = time.time()
+p1 = part1()
+print('Part 1:',p1, '\t\t', round((time.time() - start_time)*1000), 'ms')
+
+#########################################
+#                                       #
+#              Part 2                   #
+#                                       #
+#########################################
+
+def part2_slow(): # ~2400ms
+    arr = loadList(input_f)
+    score = 0
+    for a in arr:
+        nums = list2int(re.split(r'-',a))
+        for x in range(nums[0],nums[1]+1):
+            val = re.fullmatch(r'^(.+)\1+$',str(x))
+            if val != None:
+                score += int(val.group(0))
+
+def part2_regex_optimized(): # ~1200ms
+    arr = loadList(input_f)
+    score = 0
+    for a in arr:
+        nums = list2int(re.split(r'-', a))
+        # Use regex but compile it once
+        pattern = re.compile(r'^(.+)\1+$')
+        for x in range(nums[0], nums[1] + 1):
+            if pattern.fullmatch(str(x)):
+                score += x
+    return score
+
+def part2(): # ~4000ms
+    
+    arr = loadList(input_f)
+    score = 0
+    for a in arr:
+        nums = list2int(re.split(r'-',a))
+        skip = False
+        for x in range(nums[0],nums[1]+1):
+            str_len = len(str(x))
+            block = str_len // 2
+            for y in range(1,block+1):
+            ###### adding this, made it ~3000ms
+                if str_len % y != 0: 
+                    continue
+            ######
+                repeats = str_len // y
+                if repeats < 2:
+                    continue
+
+                r = str(x)[:y]*repeats
+                #print('r: ',r,end=' ')
+                if r == str(x):
+                    score += x
+                    break
+    return score
+
+start_time = time.time()
+p2 = part2_regex_optimized()
+print('Part 2:',p2, '\t\t', round((time.time() - start_time)*1000), 'ms')