2023 Day 5 (P1 only)

2023/Day-05/day05-1.py

@@ -0,0 +1,44 @@
+#!/usr/bin/python3
+
+def main():
+    seeds = []
+    ranges = {}
+
+    with open('input.txt', 'r') as input_file:
+        line = input_file.readline().strip()
+        while line != '':
+            if line.startswith('seeds:'):
+                seeds = [int(seed) for seed in line.split(':')[1].split()]
+                input_file.readline()
+                line = input_file.readline().strip()
+            else:
+                map = line.split()[0]
+                ranges[map] = {}
+                line = input_file.readline().strip()
+                while line != '':
+                    digits = [int(num) for num in line.split()]
+                    dest_range = range(digits[0], digits[0] + digits[2])
+                    source_range = range(digits[1], digits[1] + digits[2])
+                    ranges[map][source_range] = dest_range
+                    line = input_file.readline().strip()
+                line = input_file.readline().strip()
+    
+    locations = []
+
+    for seed in seeds:
+        next_val = seed
+        for map in ranges:
+            for source in ranges[map]:
+                if next_val in source:
+                    difference = source.start - ranges[map][source].start
+                    next_val = next_val - difference
+                    break
+                else:
+                    next_val = next_val
+
+        locations.append(next_val)
+
+    print(min(locations))
+
+if __name__ == '__main__':
+    main()