小小红题，不在话下

#include <iostream>
using namespace std;
int main(){
    int n;
    cin >> n;
    switch(n % 7){
        case 0:{
            cout << "monday" << endl;
            break;
        }
        case 1:{
            cout << "tuesday" << endl;
            break;
        }
        case 2:{
            cout << "wednesday" << endl;
            break;
        }
        case 3:{
            cout << "thursday" << endl;
            break;
        }
        case 4:{
            cout << "friday" << endl;
            break;
        }
        case 5:{
            cout << "saturday" << endl;
            break;
        }
        case 6:{
            cout << "sunday" << endl;
            break;
        }
    }
    return 0;
}

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