Cod sursa(job #154591)

Utilizator ciprianfFarcasanu Alexandru Ciprian ciprianf Data 11 martie 2008 12:18:05
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.27 kb
Raporteaza aceasta sursa 
#include <stdio.h>
char v[2000005];
int w[1009];
int main(){
	int n,i,k=0,j,nr=0;
	freopen("ciur.in","r",stdin);
	freopen("ciur.out","w",stdout);
	scanf("%d",&n);
	for(i=2;i<=n;i++)
		if(!v[i]){
			nr++;
			for(j=i+i;j<=n;j+=i)
				v[j]=1;
		}
	printf("%d",nr);
}