#include <iostream>
using namespace std;
int main( ) {
int i,n,a,b,k= 1 ,q= 1 ,e= 3 ,w= 0 ,x= 0 ;
a= 1 ;
b= 2 ;
n= 18 ;
for ( i= 1 ; i<= n; i++ )
{
if ( q== e)
{
w= 1
e= e+ 4 ;
}
}
if ( q% 2 == 0 && w== 0 )
{ cout << b; i= i+ 1 ; }
else
{ cout << a; i= i+ 1 ; }
if ( q% 2 == 0 && w== 1 )
{ cout << a; i= i+ 1 ; }
else
{ cout << b; i= i+ 1 ; }
if ( q% 2 ! = 0 && w== 0 )
{
if ( ( n- i) >= 2 )
{
cout << b<< b;
i= i+ 2 ;
}
else
{ cout << b; i= i+ 1 ; }
q++ ;
}
else
if ( q% 2 == 0 && w== 0 )
{
if ( ( n- i) >= 2 )
{
cout << a<< a;
i= i+ 2 ;
}
else
{ cout << a; i= i+ 1 ; }
q++ ;
}
if ( q% 2 ! = 0 && w== 1 )
{
if ( ( n- i) >= 2 )
{
cout << a<< a;
i= i+ 2 ;
}
else
{ cout << a; i= i+ 1 ; }
q++ ;
}
else
if ( q% 2 == 0 && w== 1 )
{
if ( ( n- i) >= 2 )
{
cout << b<< b;
i= i+ 2 ;
}
else
{ cout << b; i= i+ 1 ; }
q++ ;
}
if ( ( n- i) >= 1 )
if ( q% 2 == 0 && w== 0 )
cout << a;
else
cout << b;
if ( ( n- i) >= 1 )
if ( q% 2 == 0 && w== 1 )
cout << b;
else
cout << a;
if ( w== 1 )
w= 0 ;
}
return 0 ;
}
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