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Cod sursa(job #870403)
#include<stdio.h>
int v[10001];
void inm(int a,int v[])
{
int i,r=0;
for(i=1;i<=v[0];i++)
{
r=r+v[i]*a;
v[i]=r%10;
r=r/10;
}
while(r!=0)
{
v[i]=r%10;
r=r/10;
i++;
}
v[0]=i-1;
}
int main()
{
freopen("patrate2.in","r",stdin);
freopen("patrate2.out","w",stdout);
int n,i;
scanf("%d",&n);
v[0]=1;
v[1]=1;
for(i=1;i<=n*n/3;i++)
inm(8,v);
for(i=1;i<=n*n%3;i++)
inm(2,v);
for(i=2;i<=n;i++)
inm(i,v);
for(i=v[0];i>=1;i--)
printf("%d",v[i]);
printf("\n");
return 0;
}