var a,b,c,d:array[1..1000000] of int64;
n:int64;
i:Longint;
begin
read(n);
read(a[1],b[1],c[1],d[1]);
for i:=1 to n-1 Do
begin
a[i+1]:=a[i]+b[i];
b[i+1]:=b[i]+c[i];
c[i+1]:=c[i]+d[i];
d[i+1]:=d[i]+a[i];
end;
write(a[n]+b[n]+c[n]+d[n]);
end.

include <iostream>

include <bits/stdc++.h>

using namespace std;
long long n,z,l[10000],t[10000],i=1;
//int n;
int main()
{
freopen("tpn.inp","r",stdin);
freopen("tpn.out","w",stdout);
cin>>n;
//cout<<n;
while(z<=n)
{
l[i]=iii;
z=l[i];
t[i]=t[i-1]+l[i];
i++;
}
cout<<t[i-2]+l[i-2]*(n-l[i-2]);

return 0;

}

Nguyễn Đoàn Cẩm Vy

Giáo Viên Tin Học Trường TH Nguyễn Du