uses crt;
const
n=10;
var
mas:array [1..n] of integer;
i,k,l:integer;
w:real;
function log(b:real):real;
begin
log:=ln(b)/ln(5);
end;
begin
k:=0;
randomize;
for i:=1 to n do begin
mas[i]:=random(50)+1;
mas[5]:=25;
mas[8]:=125;
mas[7]:=25;
write (mas[i]:4);
log(mas[i]);
w:=(log(mas[i]));
if mas[i]=exp(ln(5)*w) then inc(k);
end;
writeln;
write ('k=',k);
readln
end.

const
 n=10;
var
 mas:array [1..n] of Word;
 i:Integer;
 N_5:Byte;

Function f5(k:Word):Boolean;
Var
 d,m:Word;
Begin
 Repeat
  d:=k div 5;
  m:=k mod 5;
  if m=0 then k:=d;
 Until (m>0) or ((m=0) and (d=1));
 f5:=((m=0) and (d=1));
End;

BEGIN
 for i:=1 to n do
  begin
   write('mas[',i:2,']= ');
   readln(mas[i]);
  end;
 N_5:=0;
 For i:=1 to n do
  if f5(mas[i]) then Inc(N_5);
 writeln('Number of 5 powers is ',N_5);
 readln;
END.