Discrete Logarithm (verify/number_theory/discrete_log.test.cpp)

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• Last update: 2026-04-22 09:17:08-07:00
• Problem: https://judge.yosupo.jp/problem/discrete_logarithm_mod

Depends on

• cp-algo/math/common.hpp
• cp-algo/number_theory/discrete_log.hpp
• cp-algo/number_theory/euler.hpp
• cp-algo/number_theory/factorize.hpp
• cp-algo/number_theory/modint.hpp
• cp-algo/number_theory/primality.hpp
• cp-algo/random/rng.hpp
• cp-algo/util/big_alloc.hpp
• cp-algo/util/generator.hpp

Code

// @brief Discrete Logarithm
#define PROBLEM "https://judge.yosupo.jp/problem/discrete_logarithm_mod"
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
#include "cp-algo/number_theory/discrete_log.hpp"
#include <bits/stdc++.h>

using namespace std;
using namespace cp_algo;
using namespace math;
using base = dynamic_modint<>;

void solve() {
    int x, y, m;
    cin >> x >> y >> m;
    auto res = discrete_log(x, y, m);
    if(res) {
        cout << *res << "\n";
    } else {
        cout << -1 << "\n";
    }
}

signed main() {
    //freopen("input.txt", "r", stdin);
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
    cin >> t;
    while(t--) {
        solve();
    }
}

Traceback (most recent call last):
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/resolver.py", line 290, in resolve
    bundled_code = language.bundle(path, basedir=basedir)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/languages/cplusplus.py", line 243, in bundle
    bundler.update(path)
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/languages/cplusplus_bundle.py", line 322, in update
    assert len(lines) == len(uncommented_lines)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError

Test cases

Env	Name	Status	Elapsed	Memory
g++	even_mod_00	AC	1189 ms	6 MB
g++	even_mod_01	AC	1132 ms	6 MB
g++	even_mod_impossible_00	AC	1109 ms	6 MB
g++	even_mod_impossible_01	AC	1069 ms	6 MB
g++	example_00	AC	2 ms	4 MB
g++	max_random_00	AC	1132 ms	6 MB
g++	max_random_01	AC	1112 ms	6 MB
g++	max_random_02	AC	1105 ms	6 MB
g++	max_random_yes_00	AC	440 ms	6 MB
g++	max_random_yes_01	AC	438 ms	6 MB
g++	max_random_yes_prime_00	AC	644 ms	6 MB
g++	max_random_yes_prime_01	AC	724 ms	6 MB
g++	random_00	AC	362 ms	6 MB
g++	random_01	AC	520 ms	6 MB
g++	random_02	AC	661 ms	6 MB
g++	random_prime_00	AC	932 ms	6 MB
g++	random_prime_01	AC	911 ms	6 MB
g++	small_00	AC	2 ms	4 MB
g++	small_01	AC	2 ms	4 MB
g++	small_02	AC	2 ms	4 MB

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