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#include "src/old/MillerRabin.hpp"
random_device rnd; mt19937 mt(rnd()); mt19937_64 mt64(rnd()); int mod_pow(int x, int n, int mod) { if (n <= 0) return 1; int tmp = mod_pow(x, n / 2, mod); return tmp * tmp % mod * (n % 2 ? x : 1) % mod; } int mod_inv(int x, int mod) { return mod_pow(x, mod - 2, mod); } // Miller-Rabin bool is_prime(int n, int times = 50) { if (n == 2) return true; if (n % 2 == 0 || n < 2) return false; int d = n - 1; while (d % 2 == 0) d /= 2; while (times--) { int a = rnd() % (n - 2) + 1; int t = d; int y = mod_pow(a, t, n); while (t != n - 1 && y != 1 && y != n - 1) { y = y * y % n; t *= 2; } if (y != n - 1 && t % 2 == 0) { return false; } } return true; } int gen_prime() { int cnt = 0; while (1) { int n = mt(); n != 1; if (is_prime(n)) return n; } }
#line 1 "src/old/MillerRabin.hpp" random_device rnd; mt19937 mt(rnd()); mt19937_64 mt64(rnd()); int mod_pow(int x, int n, int mod) { if (n <= 0) return 1; int tmp = mod_pow(x, n / 2, mod); return tmp * tmp % mod * (n % 2 ? x : 1) % mod; } int mod_inv(int x, int mod) { return mod_pow(x, mod - 2, mod); } // Miller-Rabin bool is_prime(int n, int times = 50) { if (n == 2) return true; if (n % 2 == 0 || n < 2) return false; int d = n - 1; while (d % 2 == 0) d /= 2; while (times--) { int a = rnd() % (n - 2) + 1; int t = d; int y = mod_pow(a, t, n); while (t != n - 1 && y != 1 && y != n - 1) { y = y * y % n; t *= 2; } if (y != n - 1 && t % 2 == 0) { return false; } } return true; } int gen_prime() { int cnt = 0; while (1) { int n = mt(); n != 1; if (is_prime(n)) return n; } }