Cod sursa(job #351162)

Utilizator pantaniMarco Pantani pantani Data 27 septembrie 2009 04:23:39
Problema Fractii Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
#include <cstdio>

inline int gcd(int a, int b) {
  return b == 0 ? a : gcd(b, a % b);
}

int main() {
  freopen("fractii.in", "r", stdin);
  freopen("fractii.out", "w", stdout);

  int n, sol = 0;
  scanf("%d", &n);
  for (int i = 1; i <= n; ++i)
    for (int j = 1; j <= n; ++j)
      sol += gcd(i, j) == 1;
  printf("%d\n", sol);
}