Initial commit

2023/3/one.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+
+import sys
+
+input_file = sys.argv[1]
+
+with open(input_file) as fd:
+    lines = [line.rstrip() for line in fd.readlines()]
+
+height = len(lines)
+width = len(lines[0])
+
+sum = 0
+for i in range(height):
+    line = lines[i]
+    pn_str = ""
+    for j in range(width):
+        c = line[j]
+        # print(19, c)
+        if c.isnumeric():
+            if not pn_str:
+                left = j
+            pn_str += c
+            # print(20, c, pn_str)
+        if pn_str and (j == width - 1 or not line[j + 1].isnumeric()):
+            print(25, pn_str)
+            adj = False
+            for ii in range(max(i - 1, 0), min(i + 1, height - 1) + 1):
+                for jj in range(max(left - 1, 0), min(j + 1, width - 1) + 1):
+                    cc = lines[ii][jj]
+                    print(ii, jj, cc)
+                    if not cc.isnumeric() and cc != ".":
+                        print("!")
+                        adj = True
+            # print(pn_str, adj)
+            if adj:
+                pn = int(pn_str)
+                sum += pn
+            pn_str = ""
+
+print(sum)

2023/3/two.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+
+import sys
+
+input_file = sys.argv[1]
+
+with open(input_file) as fd:
+    lines = [line.rstrip() for line in fd.readlines()]
+
+height = len(lines)
+width = len(lines[0])
+
+gears = dict()
+
+sum = 0
+for i in range(height):
+    line = lines[i]
+    pn_str = ""
+    for j in range(width):
+        c = line[j]
+        # print(19, c)
+        if c.isnumeric():
+            if not pn_str:
+                left = j
+            pn_str += c
+            # print(20, c, pn_str)
+        if pn_str and (j == width - 1 or not line[j + 1].isnumeric()):
+            for ii in range(max(i - 1, 0), min(i + 1, height - 1) + 1):
+                for jj in range(max(left - 1, 0), min(j + 1, width - 1) + 1):
+                    cc = lines[ii][jj]
+                    # print(ii, jj, cc)
+                    if cc == "*":
+                        gears.setdefault((ii, jj), list())
+                        gears[(ii, jj)].append(int(pn_str))
+            pn_str = ""
+for gear_numbers in gears.values():
+    if len(gear_numbers) != 2:
+        continue
+    gear_ratio = gear_numbers[0] * gear_numbers[1]
+    sum += gear_ratio
+
+print(sum)