Cod sursa(job #793509)

Utilizator erik95Scharscher Erik erik95 Data 3 octombrie 2012 13:34:38
Problema Ciurul lui Eratosthenes Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.33 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>
using namespace std;
ifstream f("ciur.in");
ofstream g("ciur.out");
int n,p[20000000],i,nr=0,j;
int main()
{f>>n;
for(i=2;i<=n;i++)
	p[i]=1;
for(i=2;i<=n;i++)
	if(p[i]==1)
		{nr++;
		for(j=i+i;j<=n;j+=i)
			p[j]=0;
		}
for(i=1;i<=n;i++)
	cout<<p[i];
cout<<nr;
f.close();
g.close();
}