#include<stdio.h>
int main()
{
int n,a,b,c;
int w=n*2-2;
for(a=0;a<n;a++)
{
for(b=0;b<n-a;b++)
{
}
for(c=1;c<=2*a-1;c++)
{
}
}
for(a=0;a<n;a++)
{
for(b=0;b<a;b++)
{
}
for(c=1;c<=w-(2*a-1);c++)
{
}
}
return 0;
}
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