Cod sursa(job #2680479)
Utilizator | David Curca divadd | Data | 3 decembrie 2020 16:54:11 |
---|---|---|---|
Problema | Fractii | Scor | 10 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.44 kb |
#include <fstream>
using namespace std;
int n,ans;
ifstream fin("fractii.in");
ofstream fout("fractii.out");
int gcd(int a, int b)
{
if (a == 0)
return b;
return gcd(b%a, a);
}
int main()
{
fin >> n;
for(int i = 1; i <= n; i++){
for(int j = 1; j <= n; j++){
if(gcd(i, j) == 1){
ans++;
}
}
}
fout << ans << "\n";
return 0;
}