zoj 3328 Wu Xing

# include <cstdio># include <iostream># include <set># include <map># include <vector># include <list># include <queue># include <stack># include <cstring># include <string># include <cstdlib># include <cmath># include <algorithm># define ll long longusing namespace std ;int main ( ) { ll n ; while ( cin >> n , n ) { cout << n / 2 << endl ; }}