Cod sursa(job #695951)

Utilizator ignadariusIgna Darius ignadarius Data 28 februarie 2012 15:51:01
Problema Ciurul lui Eratosthenes Scor 30
Compilator fpc Status done
Runda Arhiva educationala Marime 0.32 kb
Raporteaza aceasta sursa 
var f,g:text;i,n:longint;a:array[1..2000000]of boolean;
k,j:integer;
begin
assign(f,'ciur.in');reset(f);
assign(g,'ciur.out');rewrite(g);
read(f,n);
for i:=1 to n do
a[i]:=true;
for i:=2 to n do
for j:=2 to n div i do
a[i*j]:=false;
for i:=2 to n do
if a[i]=true then k:=k+1;
write(g,k);
close(f);
close(g);
end.