2025-day01 optimised

Author: liamgallear

2025/day01/.bench

@@ -1 +1 @@
-{"Lines":[{"Name":"Part 1","N":2691,"NsPerOp":457758,"AllocedBytesPerOp":0,"AllocsPerOp":0,"MBPerS":0,"Measured":1,"Ord":0},{"Name":"Part 2","N":6332,"NsPerOp":192958,"AllocedBytesPerOp":0,"AllocsPerOp":0,"MBPerS":0,"Measured":1,"Ord":0}],"Measured":1}
+{"Lines":[{"Name":"Part 1","N":2703,"NsPerOp":439099,"AllocedBytesPerOp":0,"AllocsPerOp":0,"MBPerS":0,"Measured":1,"Ord":0},{"Name":"Part 2","N":6356,"NsPerOp":188973,"AllocedBytesPerOp":0,"AllocsPerOp":0,"MBPerS":0,"Measured":1,"Ord":0}],"Measured":1}

2025/day01/part1.go

@@ -15,7 +15,7 @@ func doPartOne(input string) int {
 			num = -num
 		}
 		r = r.Move(num)
-		if r.Value == 0 {
+		if r.Value.(int) == 0 {
 			ans++
 		}
 	}

2025/day01/part2.go

@@ -7,7 +7,13 @@ import (
 
 func doPartTwo(input string) int {
 	lines := strings.Split(strings.TrimSpace(input), "\n")
-	r = r.Move(50)
+
+	// Calculate where we need to move to get to position 50
+	// Since r.Value equals the position, we can calculate the offset
+	currentPos := r.Value.(int)
+	offset := (50 - currentPos + 100) % 100
+	r = r.Move(offset)
+
 	ans := 0
 	for _, line := range lines {
 		num := utils.Atoi(line[1:])