Day 4 solution, part 2.

2018/day04-2.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"fmt"
+
+	"internal/guards"
+	"internal/util"
+)
+
+func main() {
+	data := util.ReadInput()
+	shifts := guards.ParseInput(data)
+	guards := guards.BuildGuards(shifts)
+
+	sleepiest, sleepiestMinute := FindSleepiestData(guards)
+
+	fmt.Printf("Sleepiest Guard: %d\n", sleepiest.ID)
+	fmt.Printf("Sleepiest Minute: %d\n", sleepiestMinute)
+	fmt.Printf("Result: %d\n", sleepiest.ID*sleepiestMinute)
+}
+
+func FindSleepiestData(data map[int]*guards.Guard) (*guards.Guard, int) {
+	var sleepiest *guards.Guard
+	var minute, value int
+
+	for _, guard := range data {
+		for i := 0; i < 60; i++ {
+			if guard.Sleep[i] > value {
+				sleepiest = guard
+				minute = i
+				value = guard.Sleep[i]
+			}
+		}
+	}
+
+	return sleepiest, minute
+}