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