推销：快手屑小M

#include <iostream>
using namespace std;
int main(){
int n;
cin>>n;
n=(n+1)%7;
switch (n)
{
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 0: cout<<"sunday";break;
}

return 0;

}