一般般。

#include<iostream>
using namespace std;
int main(){
int n; //n代表几天
cin>>n;

if(n%7==0||n==0){
    cout<<"monday";
}
if(n%7==1||n==1){
    cout<<"tuesday";
}
if(n%7==2||n==2){
    cout<<"wednesday";
}
if(n%7==3||n==3){
    cout<<"thursday";
}
if(n%7==4||n==4){
    cout<<"friday";
}
if(n%7==5||n==5){
    cout<<"saturday";
}
if(n%7==6||n==6){
    cout<<"sunday";
}

return 0;

}