uses crt;
var c,p,s:real;
begin
clrscr;
write('C-> ');
readln(c);
p:=c+c/sqrt(5)+2*c/sqrt(5);
s:=sqr(c)/5;
writeln('P = ',p:0:4);
writeln('S = ',s:0:4);
readln;
end.
uses crt;
var c,p,s:real;
begin
clrscr;
write('C-> ');
readln(c);
p:=c+c/sqrt(5)+2*c/sqrt(5);
s:=sqr(c)/5;
writeln('P = ',p:0:4);
writeln('S = ',s:0:4);
readln;
end.