Cod sursa(job #1071036)
Utilizator | Data | 2 ianuarie 2014 14:52:03 | |
---|---|---|---|
Problema | Fractii | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.45 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f;
ofstream g;
long int i,n,j,s,k;
main()
{
f.open("fractii.in");
g.open("fractii.out");
f>>n;
s=0;
k=0;
for(i=2;i<=n;i++){
k=0;
j=2;
if(i>j){while(i%j!=0)j++;s=s+n-n/j-n/i/j;}
else {while(j%i!=0)j++;
s=s+n-n/j-n/j/i;}
}
g<<s+n+1;
g.close();
}