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Cod sursa(job #374724)
program ize;
var n,p,c,k:longint;
r:extended;
be,ki:text;
function prim(x:longint):boolean;
var i:longint;
begin
prim:=true;
for i:=2 to round(sqrt(x)) do
if (x mod i)=0 then
begin
prim:=false;
exit;
end;
end;
procedure kovprim(var p:longint);
var i:integer;
begin
if p=2 then inc(p) else inc(p,2);
while not prim(p) do inc(p,2);
end;
begin
assign(be,'ciur.in');
assign(ki,'ciur.out');
reset(be);
rewrite(ki);
readln(be,n);
r:=1;
p:=2;
c:=0;
k:=1;
while p*p <= n do
begin
c:=c+trunc(((n div p)-1)*r);
writeln(p,' ',c,' ',r:6:3,' ',round(((n/p)-1)*r),' ',(n div p)-1);
inc(k);
r:=1/k;
kovprim(p);
end;
writeln(ki,n-c-1);
close(ki);
end.