Advent of Code 2025 - Day 7 : Python version

advent_of_code/2025(python)/day7.py

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+
+def solve_day7_part1(input_):
+    input_ = [list(line) for line in input_]
+    split_cnt = 0
+    for i, line in enumerate(input_):
+        if i == 0:
+            line[line.index('S')] = '|'
+            continue
+
+        for j, ch in enumerate(line):
+            if input_[i-1][j] == '|':
+                if ch == '^':
+                    split_cnt += 1
+                    if j > 0:
+                        line[j-1] = '|'
+                    if j < len(line)-1:
+                        line[j+1] = '|'
+                else:
+                    line[j] = '|'
+
+    return split_cnt