#23781: 就是跟別人不一樣
y21567132@gmail.com
(劉冠麟)
#include<iostream>
using namespace std;
int main(){
int n,a;
cin>>n;
a=(n-1)/3+1;
cout<<a;
return 0;
}
#include<iostream>
using namespace std;
int main(){
int n,a;
cin>>n;
a=(n-1)/3+1;
cout<<a;
return 0;
}