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Cod sursa(job #866135)
#include <fstream>
#define nmax 10100
using namespace std;
int N,A[nmax];
void Produs(int Val) {
int i,Rest=0;
for(i=1;i<=A[0] || Rest;i++)
A[i]=A[i]*Val+Rest%10,
Rest=Rest/10+A[i]/10,
A[i]%=10;
A[0]=i-1;
}
void solve() {
int i,M;
A[0]=A[1]=1;
for(i=2;i<=N;i++)
Produs(i);
M=N*N/16;
for(i=1;i<=M;i++)
Produs(1<<16);
M=N*N&15;
for(i=1;i<=M;i++)
Produs(2);
}
void read() {
ifstream in("patrate2.in");
in>>N;
in.close();
}
void write() {
ofstream out("patrate2.out");
for(int i=A[0];i>=1;out<<A[i--]);
out<<'\n';
out.close();
}
int main() {
read();
solve();
write();
return 0;
}