题解 | #【模板】队列#

package main

import (
    "fmt"
)

func main() {
    a := 0;
    erene := make([]int,0);
    ch , num := "",0;
    fmt.Scanln(&a);
    for i:=0;i<a;i++{
      fmt.Scanf("%s %d", &ch,&num);
      switch ch{
        case "push": erene = append(erene, num);
        case "pop" :if len(erene) ==0 {
            fmt.Println("error");
        }else{
            fmt.Println(erene[0]);
            erene=erene[1:];
        }
        case "front" :if len(erene) ==0 {
            fmt.Println("error");
        }else{
            fmt.Println(erene[0]);
        }
      }
    }
}