Cod sursa(job #161265)
Utilizator | Data | 17 martie 2008 20:28:50 | |
---|---|---|---|
Problema | Ciurul lui Eratosthenes | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.48 kb |
#include<stdio.h>
#include<string.h>
long n,i,l=0,j,s[1024];
char a[2000010];
int main()
{
freopen("ciur.in","r",stdin);
freopen("ciur.out","w",stdout);
scanf("%ld",&n);
for(i=2;i<=n;++i)
if(a[i]==0)
{++l;
for(j=i+i;j<=n;j+=i) a[j]=1;
}
printf("%ld\n",l);
i=0;
for(j=n;j>1;--j)
if(j>1)
if(a[j]==0)
if((i<1000)&&(i<=l))
++i;
else
break;
// for(j=i;j;--j)printf("%ld ",s[j]);
printf("%ld\n",i);
return 0;
}