题解

#include<iostream>
using namespace std;
int main(){
int n;
cin>>n;
if((n+1)%71){
cout<<"monday"<<endl;
}
if((n+1)%72){
cout<<"tuesday"<<endl;
}
if((n+1)%73){
cout<<"wednesday"<<endl;
}
if((n+1)%74){
cout<<"thursday"<<endl;
}
if((n+1)%75){
cout<<"friday"<<endl;
}
if((n+1)%76){
cout<<"saturday"<<endl;
}
if((n+1)%7==0){
cout<<"sunday"<<endl;
}
return 0;
}