Cod sursa(job #693497)
Utilizator | Ivanciu Adrian adrian.ivanciu | Data | 27 februarie 2012 13:02:26 |
---|---|---|---|
Problema | Fractii | Scor | 10 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.35 kb |
#include<fstream>
using namespace std;
int n,i,j,k;
int cmmdc(int a, int b)
{
while(a!=b)
{
if(a>b)a-=b;
else b-=a;
}
return a;
}
int main()
{
ifstream f("fractii.in");
ofstream g("fractii.out");
f>>n;
k=2*n-1;
for(i=2;i<=n;i++){
for(j=2;j<=n;j++)
if(i!=j&&!(i%2==0&&j%2==0))if(cmmdc(i,j)==1)k++;
}
// for(i=2;i<=n;i++)
g<<k;
}