简单

#include <bits/stdc++.h>
using namespace std;
int n,x;
int main(){
cin>>n;
x=(n+1)%7;
if(x1)cout<<"monday";
if(x2)cout<<"tuesday";
if(x3)cout<<"wednesday";
if(x4)cout<<"thursday";
if(x5)cout<<"friday";
if(x6)cout<<"saturday";
if(x==0)cout<<"sunday";

return 0;

}