Cod sursa(job #2498664)
Utilizator | Data | 24 noiembrie 2019 10:32:23 | |
---|---|---|---|
Problema | Ciurul lui Eratosthenes | Scor | 0 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.32 kb |
#include <fstream>
using namespace std;
ifstream cin("ciur.in");
ofstream cout("ciur.out");
int main()
{
unsigned int n, s=0;
cin >> n;
if (n > 3) {
s = 2;
for (int i = n; i > 3; i--)
if (i % 2 != 0 && i % 3 != 0) s++;
}
if (n == 3) s = 2;
if (n==2) s=1
cout << s;
return 0;
}