Cod sursa(job #946537)
| Utilizator |  Casapu Dorian Dorian7 |
Data | 4 mai 2013 18:54:59 |
|---|---|---|---|
| Problema | Fractii | Scor | 10 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.35 kb |
#include<iostream>
#include<fstream>
using namespace std;
int main()
{ long long int n,i,j,s,r,b;
ifstream f("fractii.in");
ofstream g("fractii.out");
f>>n;
s=2*n-1;
b=0;
for(i=2;i<=n;i++)
for(j=i+1;j<=n;j++)
{long long int x,y;
x=i;y=j;
while(x%y!=0)
{r=x%y;
x=y;
y=r;
}
if(y==1)
b++;
}
g<<s+2*b;
f.close();
g.close();
}
