add new solutions

solutions/6/q636/solution.go

@@ -0,0 +1,35 @@
+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