diff options
Diffstat (limited to 'math/primitiveRoot.cpp')
| -rw-r--r-- | math/primitiveRoot.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/math/primitiveRoot.cpp b/math/primitiveRoot.cpp index 7973c24..464bdb3 100644 --- a/math/primitiveRoot.cpp +++ b/math/primitiveRoot.cpp @@ -1,12 +1,12 @@ bool isPrimitive(ll g, ll n, ll phi, map<ll, int> phiFacs) { if (g == 1) return n == 2; - for (auto& f : phiFacs) - if (1 == powMod(g, phi / f.first, n)) return false; + for (auto [f, _] : phiFacs) + if (powMod(g, phi / f, n) == 1) return false; return true; } bool isPrimitive(ll g, ll n) { - ll phin = phi(n); //isPrime(n) => phi(n) = n - 1 + ll phin = phi(n); //isPrime(n) => phi(n) = n - 1 map<ll, int> phiFacs; factor(phin, phiFacs); return isPrimitive(g, n, phin, phiFacs); |