题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    int m=(n+1)%7;
    if(m==1)cout<<"monday";
    if(m==2)cout<<"tuesday";
    if(m==3)cout<<"wednesday";
    if(m==4)cout<<"thursday";
    if(m==5)cout<<"friday";
    if(m==6)cout<<"saturday";
    if(m==0)cout<<"sunday";
    return 0;
}