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Cod sursa(job #189296)
#include<stdio.h>
void prod(char x[],long b){
;
}
int main(){
freopen("patrate2.in","r",stdin);
freopen("patrate2.out","w",stdout);
int n,i,n2;
unsigned long long r=1L,p2=1,f=1L;
long double x=1;
long p[32],y,z;
char v[3200]={0};
v[0]=1;
scanf("%d",&n);
n2=n*n;
p[0]=1;
for(i=1;i<=31;i++) p[i]=p[i-1]*2;
if(n<8){
for(i=2;i<=n;i++) f=f*i;
for(i=1;i<=n2;i++) p2=p2*2;
r=f*p2;
printf("%llu",r);
}
else{
y=n2;
do {
if(y>=28) z=28;
else z=y;
prod(v,z);
y-=z;
}while(y);
for(i=2;i<=n;i++) prod(v,i);
printf("%Lf\n",x);
}
return 0;
}