就这，黄标？最直接的题解

#include <iostream>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n%7==0){
        cout<<"Monday"; 
    }
    if(n%7==1){
        cout<<"Tuesday"; 
    }
    if(n%7==2){
        cout<<"Wednesday"; 
    }
    if(n%7==3){
        cout<<"Thursday"; 
    }
    if(n%7==4){
        cout<<"Friday"; 
    }
    if(n%7==5){
        cout<<"Saturday"; 
    }
    if(n%7==6){
        cout<<"Sunday"; 
    }
    return 0;
}