Cod sursa(job #795321)
Utilizator | Data | 8 octombrie 2012 11:57:17 | |
---|---|---|---|
Problema | Ciurul lui Eratosthenes | Scor | 20 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.37 kb |
#include<iostream>
#include<fstream>
using namespace std;
int main()
{
ifstream f("ciur.in");
ofstream o("ciur.out");
int n,i,nd,d,j=0;
f>>n;
for (i=1;i<=n;i++)
{
nd=0;
for (d=1;d<=i;d++)
{
if (i%d==0)
nd++;
}
if (nd==2)
j=j+1;
}
o<<j;
}