//Sorry I know only C++ language
#include<iostream>
using namespace std;
int main(){
<span> char a,b,c,d,a2,b2,c2,d2;</span><span>
cin>>a>>b>>c>>d;
</span><span> a2=a-48;
</span><span> b2=b-48;
</span><span> c2=c-48;</span><span>
d2=d-48;
</span><span> cout<<(a2+b2+c2+d2)%4;</span>
return 0;}<span>
</span>
var bn,sn,b1,q,n:real;
begin
write('b1=');
read(b1);
write('q=');
read(q);
write('n=');
read(n);
bn:=b1*power(q,n-1);
sn:=(b1*(power(q,n)-1))/(q-1);
writeln('Bn=',bn);
writeln('Sn=',sn);
end.
УРУГВАЙ ,ПАРАГВАЙ,АФГАНИСТАН