#include <stdio.h>
void writeX(int n)
{
int i;
for( i = 0; i < n; i++ )
{
}
}
void figure(int n)
{
if(n <= 0)
{
}
else if(n == 1)
{
writeX(n);
}
else
{
figure(n-1);
writeX(n);
figure(n-1);
}
}
int main(void)
{
int n;
figure(n);
return 0;
}
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