Cod sursa(job #154404)

Utilizator Matei14Popa-Matei Mihai Matei14 Data 11 martie 2008 10:17:27
Problema Ciurul lui Eratosthenes Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.34 kb
Raporteaza aceasta sursa 
#include<stdio.h>
#define N 2000010
int n,i,j;
int sol[1024];
char viz[N];
void solv(){
	int cont=0;
	for(i=2;i<=n;i++)
		if(viz[i]==0){
		for(j=i+i;j<=n;j+=i)
			viz[j]=1;
		cont++;
		}
	printf("%d\n",cont);
}
int main(){
	freopen("ciur.in","r",stdin);
	freopen("ciur.out","w",stdout);
	scanf("%d",&n);
	solv();
	return 0;
}