package q636

import (
	"strconv"
	"strings"
)

func exclusiveTime(n int, logs []string) []int {
	ret := make([]int, n)
	stack := make([][3]int, 0, 256) // proc id, start time, child exec time

	for i := range logs {
		fields := strings.FieldsFunc(logs[i], func(r rune) bool { return r == ':' })
		id, _ := strconv.ParseInt(fields[0], 10, strconv.IntSize)
		action := fields[1]
		curTime, _ := strconv.ParseInt(fields[2], 10, strconv.IntSize)

		switch action {
		case "start":
			stack = append(stack, [3]int{int(id), int(curTime), 0})
		case "end":
			i := len(stack) - 1
			id, stT, chT := stack[i][0], stack[i][1], stack[i][2]
			ret[id] += int(curTime) - stT + 1 - chT

			if len(stack) > 1 {
				stack[i-1][2] += int(curTime) - stT + 1
			}
			stack = stack[:len(stack)-1] // pop
		}
	}
	return ret
}

var _ = exclusiveTime