Pagini recente » Borderou de evaluare (job #1072210) | Cod sursa (job #1386181) | Cod sursa (job #767187) | Borderou de evaluare (job #2415637) | Cod sursa (job #801249)
Cod sursa(job #801249)
#include <stdio.h>
const int NMax = 10000;
int main()
{
int N,i,j,nr=0,ciur[NMax];
freopen("ciur.in", "r", stdin);
freopen("ciur.out", "w", stdout);
scanf("%d", &N);
for(i=2;i<=N;i++)
ciur[i]=1;
for(i=2;i*i<N;i++)
if(ciur[i])
for(j=2;j*i<=N;j++)
ciur[i*j]=0;
for(i=2;i<=N;i++)
if(ciur[i])
nr++;
printf("%d",nr);
return 0;
}