万能头真不戳

万能头真的是——泰裤辣！
有了万能头，就再也不用担心少写头文件了

#include <bits/stdc++.h>
using namespace std;
int main(){
    int x;
    cin>>x;
	switch(x){
		case 1:cout<<"Monday"      ;break;
		case 2:cout<<"Tuesday"     ;break;
		case 3:cout<<"Wednesday   ";break;
		case 4:cout<<"Thursday"    ;break;
		case 5:cout<<"Friday"      ;break;
		case 6:cout<<"Saturday"    ;break;
		case 7:cout<<"Sunday"      ;break;} 
    return 0;}