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@@ -0,0 +1,84 @@
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+package main
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+
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+import (
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+ "bufio"
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+ "fmt"
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+ "os"
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+ "strconv"
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+ "strings"
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+)
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+
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+/*
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+del
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+add 12
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+del
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+add 10
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+add 9
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+del
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+del
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+del
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+add 10
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+del
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+add 1
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+add 8
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+add 20
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+add 1
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+add 11
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+add 2
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+del
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+del
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+del
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+del
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+*/
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+func main() {
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+ var cQueue = Constructor()
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+ input := bufio.NewScanner(os.Stdin)
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+ for input.Scan() {
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+ line := input.Text()
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+ if !strings.HasPrefix(line, "add ") && !strings.HasPrefix(line, "del") {
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+ continue
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+ }
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+
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+ if strings.HasPrefix(line, "add ") {
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+ var digitStr = line[4:]
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+ var digit, _ = strconv.Atoi(digitStr)
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+ cQueue.AppendTail(digit)
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+ println("null")
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+ continue
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+ }
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+ if strings.HasPrefix(line, "del") {
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+ var digit = cQueue.DeleteHead()
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+ println(digit)
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+ }
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+
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+ fmt.Println(cQueue.Stack1, "---", cQueue.Stack2)
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+ }
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+}
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+
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+type CQueue struct {
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+ Stack1 []int
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+ Stack2 []int
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+}
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+
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+func Constructor() CQueue {
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+ return CQueue{}
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+}
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+
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+func (this *CQueue) AppendTail(value int) {
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+ this.Stack1 = append(this.Stack1, value)
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+}
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+
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+func (this *CQueue) DeleteHead() int {
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+ if len(this.Stack1) == 0 {
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+ return -1
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+ }
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+
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+ var value int
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+
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+ this.Stack2 = append(this.Stack2, this.Stack1[0])
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+ value = this.Stack2[0]
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+ this.Stack1 = this.Stack1[1:]
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+ this.Stack2 = this.Stack2[1:]
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+
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+ return value
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+}
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