直接上代码：
#include<bits/stdc++.h>
using namespace std;
int main(){
int a;
cin>>a;
switch(a){
case 3:
case 4:
case 5:
cout<<"spring!";
break;
case 6:
case 7:
case 8:
cout<<"summer!";
break;
case 9:
case 10:
case 11:
cout<<"autumn!";
break;
case 12:
case 1:
case 2:
cout<<"winter!";
break;
default:
