Cod sursa(job #71890)
Utilizator | Danila Iulian realboss | Data | 12 iulie 2007 00:56:59 |
---|---|---|---|
Problema | Fractii | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.38 kb |
#include<fstream>
using namespace std;
long int x,y;
int cmmmdc(long int x,long int y)
{
if(x>y)
return cmmdc(x%y,y);
else if(y>x)
return cmmdc(y%x,x);
else
return x;
}
int main()
{
int n,cont=1;
ifstream f("fractii.in");
f>>n;
for(x=1;x<n;x++)
for(y=x+1;y<=n;y++)
if(cmmdc(x,y)==1)
cont+=2;
ofstream g("fractii.out");
g<<cont<<"\n";
return 0;
}