Cod sursa(job #369682)

Utilizator cristian9Cristian Zloteanu cristian9 Data 29 noiembrie 2009 10:43:15
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.33 kb
Raporteaza aceasta sursa 
#include<stdio.h>
int main()
{freopen ("ciur.in", "r", stdin);
freopen ("ciur.out", "w", stdout);
int n, s=0, v[200001],j,i,z;
scanf("%d ", &n);
z=n;
for(i=2;i<=z;i++){
	v[i]=i;
}
for(i=2;i<=z;i++){
	if(v[i]!=0){
		s++;
		for(j=i+i;j<=n;j=j+i){
			v[j]=0;
			n++;
		}
		n=z;
	}
}
printf("%d ", s);
return 0;
}