Cod sursa(job #2446475)
Utilizator | Data | 9 august 2019 02:32:44 | |
---|---|---|---|
Problema | Fractii | Scor | 10 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.37 kb |
#include<iostream>
#include<fstream>
using namespace std;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int GCM(int i, int j)
{
if(!j) return i;
return GCM(j,i%j);
}
int main()
{
int n;
fin>>n;
long long sol=0;
for(int i=1;i<=n;i++)
for(int j=1;j<=n;j++) if(GCM(i,j)==1) sol++;
fout<<sol;
return 0;
}