My solution

Python was better for this...

Short solution in golang same speed and about same file size... 1404kb or 1342kb but that it with the input file embed

Solution 1 = (528) 528
2022/12/04 23:12:51 took 4.1761ms
Solution 2 = (881) 881
2022/12/04 23:12:51 took 4.7324ms
609.3611ms run and compile

Part A: 528
Part B: 881
took   8.435ms
605.3248ms run and compile

Solution 1 = (528) 528
2022/12/04 23:16:47 took 4.1972ms
Solution 2 = (881) 881
2022/12/04 23:16:47 took 4.2103ms
144.6807ms execute 

Part A: 528
Part B: 881
took  9.7953ms
107.0728ms execute

python 3.11 function "part1" took 2 ms 528 function "part2" took 1 ms 881 41.3036ms - 46.2702ms extra time is python interpreter so total is about 48ms that hart get exact golang 100-144 ms