#include<bits/stdc++.h>
using namespace std;
void odd(int t1, int t2, int i, string st)
{
cout << "Sheet " << i++ << ", back : " << t1 << ", " << t2 << "\n";
st = "front";
int t = 1;
t1++, t2--;
while(t1 < t2)
{
if(t == 1)
{
cout << "Sheet " << i << ", " << st << ": " << t2 << ", " << t1 << "\n";
st = "back";
t++;
}
else
{
cout << "Sheet " << i << ", " << st << " : " << t1 << ", " << t2 << "\n";
t = 1;
st = "front";
i++;
}
t1++, t2--;
}
}
void even(int t1, int t2, int i)
{
while(t1 < t2)
{
cout << "Sheet " << i << ", front: " << t2 << ", " << t1 << "\n";
t1++, t2--;
cout << "Sheet " << i++ << ", back : " << t1 << ", " << t2 << "\n";
t1++, t2--;
}
}
int main()
{
int n;
//freopen("input.txt", "r", stdin);
while(cin >> n && n != 0)
{
int i = 1, t1 = 1, t2 = n;
cout << "Printing order for " << n << " pages:\n";
if(n%4 == 3)
{
cout << "Sheet " << i << ", front: Blank, 1" << "\n";
t1 = 2;
odd(t1, t2, i, "back");
}
else if(n%4 == 2)
{
cout << "Sheet " << i << ", front: Blank, 1" << "\n";
cout << "Sheet " << i++ << ", back : 2, Blank" << "\n";
if(n == 2)
{
continue;
}
t1=3;
even(t1, t2, i);
}
else if(n%4 == 1)
{
cout << "Sheet " << i << ", front: Blank, 1" << "\n";
if(n == 1)
continue;
cout << "Sheet " << i++ << ", back : 2, Blank" << "\n";
cout << "Sheet " << i << ", front: Blank, 3" << "\n";
t1 = 4;
odd(t1, t2, i, "back");
}
else if(n%4 == 0)
{
even(t1, t2, i);
}
}
return 0;
}
using namespace std;
void odd(int t1, int t2, int i, string st)
{
cout << "Sheet " << i++ << ", back : " << t1 << ", " << t2 << "\n";
st = "front";
int t = 1;
t1++, t2--;
while(t1 < t2)
{
if(t == 1)
{
cout << "Sheet " << i << ", " << st << ": " << t2 << ", " << t1 << "\n";
st = "back";
t++;
}
else
{
cout << "Sheet " << i << ", " << st << " : " << t1 << ", " << t2 << "\n";
t = 1;
st = "front";
i++;
}
t1++, t2--;
}
}
void even(int t1, int t2, int i)
{
while(t1 < t2)
{
cout << "Sheet " << i << ", front: " << t2 << ", " << t1 << "\n";
t1++, t2--;
cout << "Sheet " << i++ << ", back : " << t1 << ", " << t2 << "\n";
t1++, t2--;
}
}
int main()
{
int n;
//freopen("input.txt", "r", stdin);
while(cin >> n && n != 0)
{
int i = 1, t1 = 1, t2 = n;
cout << "Printing order for " << n << " pages:\n";
if(n%4 == 3)
{
cout << "Sheet " << i << ", front: Blank, 1" << "\n";
t1 = 2;
odd(t1, t2, i, "back");
}
else if(n%4 == 2)
{
cout << "Sheet " << i << ", front: Blank, 1" << "\n";
cout << "Sheet " << i++ << ", back : 2, Blank" << "\n";
if(n == 2)
{
continue;
}
t1=3;
even(t1, t2, i);
}
else if(n%4 == 1)
{
cout << "Sheet " << i << ", front: Blank, 1" << "\n";
if(n == 1)
continue;
cout << "Sheet " << i++ << ", back : 2, Blank" << "\n";
cout << "Sheet " << i << ", front: Blank, 3" << "\n";
t1 = 4;
odd(t1, t2, i, "back");
}
else if(n%4 == 0)
{
even(t1, t2, i);
}
}
return 0;
}
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