Cod sursa(job #1240740)

Utilizator costty94Duica Costinel costty94 Data 11 octombrie 2014 23:19:05
Problema Ciurul lui Eratosthenes Scor 30
Compilator cpp Status done
Runda Arhiva educationala Marime 0.35 kb
Raporteaza aceasta sursa 
#include <stdio.h>
#include <stdlib.h>

int n, i, j, v[1000005], k;

int main()
{
	freopen ("ciur.in", "r", stdin);
	freopen ("ciur.out", "w", stdout);

	scanf("%d", &n);
	
	for(i = 2; i <= n; i++)
	{
		for(j = i + i; j <= n; j += i)
		{
			v[j] = 1;
		}
	}
	for(i = 2; i <=  n; i++)
		if(v[i] == 0)
			k++;
	printf("%d", k);
	return 0;
}