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Cod sursa(job #157493)
var f,f2:text;
n,fac,a,p,i,j,min:longint;
function put5(nr:longint):longint;
var put,i2:longint;
begin
put:=1;
for i2:=1 to nr do put:=put*5;
put5:=put;
end;
begin
assign(f,'fact.in');
assign(f2,'fact.out');
reset(f);
readln(f,n);
close(f);
writeln(put5(10));
if n=0 then fac:=0
else
begin
fac:=n*5;
j:=2;
min:=0;
while put5(j)<=fac do
begin
min:=min+fac div put5(j);
if fac mod put5(j)=0 then fac:=fac-5;
j:=j+1;
end;
end;
rewrite(f2);
writeln(f2,fac-min*5);
close(f2);
end.