Cod sursa(job #397716)
| Utilizator |  Andrei Tudora Dj_Andrei |
Data | 17 februarie 2010 13:06:31 |
|---|---|---|---|
| Problema | Ciurul lui Eratosthenes | Scor | 20 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 0.31 kb |
#include<stdio.h>
#include<iostream.h>
FILE *f=fopen("ciur.in","r");
FILE *g=fopen("ciur.out","w");
long n,k,i;
int main(){
fscanf(f,"%ld",&n);
k=0;
for(i=2;i<=n;i++)
if((i==2)||(i==3)||(i==5)||(i==7)||(i%2!=0&&i%3!=0&&i%5!=0&&i%7!=0))
k=k+1;
fprintf(g,"%ld",k);
fclose(f);
fclose(g);
return 0;}