Cod sursa(job #695999)

Utilizator ignadariusIgna Darius ignadarius Data 28 februarie 2012 16:11:14
Problema Ciurul lui Eratosthenes Scor 40
Compilator fpc Status done
Runda Arhiva educationala Marime 0.32 kb
Raporteaza aceasta sursa 
var f:text;i,n,k,j:longint;a:array[1..2000000]of boolean;
begin
assign(f,'ciur.in');reset(f);
read(f,n);
close(f);
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;
k:=0;
for i:=2 to n do
if a[i]=true then k:=k+1;
assign(f,'ciur.out');rewrite(f);
write(f,k);
close(f);
end.