不是很难，但是很烦！！！

#include<bits/stdc++.h>
using namespace std;
int main(){
int a;
cin>>a;
if(a%70){
cout<<"monday";
}
else if(a%71){
cout<<"tuesday";
}
else if(a%72){
cout<<"wednesday";
}
else if(a%73){
cout<<"thursday";
}
else if(a%74){
cout<<"friday";
}
else if(a%75){
cout<<"saturday";
}
else if(a%7==6){
cout<<"sunday";
}
return 0;
}