d4 with python. pretty easy tbh

2022/d4/data/example.txt

@@ -0,0 +1,6 @@
+2-4,6-8
+2-3,4-5
+5-7,7-9
+2-8,3-7
+6-6,4-6
+2-6,4-8

2022/d4/run.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env sh
+echo "example"
+python3 ./src/d4.py ./data/example.txt
+
+echo "submission"
+python3 ./src/d4.py ./data/submission.txt
+

2022/d4/src/d4.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+
+def main(file_loc: str):
+    with open(file_loc, "r") as f:
+        count = 0
+        for _line in f:
+            line = _line.strip()
+            if len(line) == 0:
+                continue
+            partners = [[int(time) for time in part.split("-")]for part in line.split(",")]
+            # check if one range contains the other
+            for i in range(2):
+                start_l, end_l = partners[i]
+                start_r, end_r = partners[1-i]
+                if start_l >= start_r and end_l <= end_r:
+                    count += 1
+                    break
+
+
+        print("part 1:", count)
+
+    with open(file_loc, "r") as f:
+        count = 0
+        for _line in f:
+            line = _line.strip()
+            if len(line) == 0:
+                continue
+            partners = [[int(time) for time in part.split("-")]for part in line.split(",")]
+            # check if overlap at all
+            # basically just check the begin and end of one
+            start_l, end_l = partners[0]
+            start_r, end_r = partners[1]
+            should_add = any(
+                    any(time in range(partners[1-i][0], partners[1-i][1]+1) 
+                for time in partners[i]) for i in range(2))
+            count += 1 if should_add else 0
+        print("part 2:", count)
+            
+
+
+if __name__ == "__main__":
+    import sys
+    if len(sys.argv) < 2:
+        raise RuntimeError("expected the first argument to point to data file location")
+    FILE_LOC=sys.argv[1]
+    main(FILE_LOC)
+