不要忘0

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