ZOJ 1178 Booklet Printing (book Folding problem)

Original title: http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=178

The book is printed in half with the big open paper. For example, a booklet of 4 pages, in order to facilitate binding, printed on the outside 1, 4 pages, the inside printing 2, 3 pages, so that after folding can be in accordance with normal reading habits page.

The sensory algorithm is more handsome than the online family's algorithm
#include <iostream>
using namespace std;
int main ()
{
	int n,sheet,four_n;
	int front[2],back[2];
	while (cin>>n&&n!=0)
	{
		if (n%4) four_n=n+4-n%4;
		else four_n=n;
		SHEET=FOUR_N/4;
		Front[0]=four_n;
		Front[1]=1;
		back[0]=2;
		back[1]=four_n-1;
		cout<< "Printing order for" <<n<< "pages:" <<endl;
		for (int i=0;i<sheet;i++)
		{
			if (n==1)
			{
				cout<< "Sheet 1, Front:blank, 1" <<endl;
				break;
			}
			Front[0]=four_n-2*i;
			Front[1]=1+2*i;
			Back[0]=2+2*i;
			Back[1]=four_n-1-2*i;
			cout<< "Sheet" <<i+1<< ", Front:";
			if (front[0]>n) cout<< "Blank";
			else cout<<front[0];
			cout<< "," <<front[1]<<endl;
			cout<< "Sheet" <<i+1<< ", Back:";
			cout<<back[0]<< ",";					
			if (back[1]>n) cout<< "Blank" <<endl;
			Else cout<<back[1]<<endl;
		}}}