test/yosupo/string/longest_common_substring.test.cpp

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• Last update: 2025-05-29 23:10:09+09:00
• Problem: https://judge.yosupo.jp/problem/longest_common_substring

Depends on

• Suffix Array (lib/string/suffix_array.hpp)

Code

// competitive-verifier: PROBLEM https://judge.yosupo.jp/problem/longest_common_substring
#include <iostream>
#include <string>
#include "string/suffix_array.hpp"

int main(void) {
    std::string s, t;
    std::cin >> s >> t;
    int n = s.size(), m = t.size();
    auto is_s = [&](int x) { return 0 <= x && x < n; };
    auto is_t = [&](int x) { return n + 1 <= x && x < n + m + 1; };
    std::string st = s + "_" + t;
    auto sa = suffix_array(st);
    auto v = lcp_array(st, sa);
    int ans = 0, a = 0, b = 0;
    for (int i = 0; i < (int)sa.size() - 1; ++i) {
        if (is_s(sa[i]) && is_t(sa[i + 1]) && ans < v[i]) {
            ans = v[i];
            a = sa[i], b = sa[i + 1] - n - 1;
        }
        if (is_t(sa[i]) && is_s(sa[i + 1]) && ans < v[i]) {
            ans = v[i];
            a = sa[i + 1], b = sa[i] - n - 1;
        }
    }
    std::cout << a << ' ' << a + ans << ' ' << b << ' ' << b + ans << '\n';

    return 0;
}

Traceback (most recent call last):
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/resolver.py", line 291, in resolve
    bundled_code = language.bundle(path, basedir=basedir)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/verify/languages/cplusplus.py", line 242, in bundle
    bundler.update(path)
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/verify/languages/cplusplus_bundle.py", line 479, in update
    self._resolve(pathlib.Path(included), included_from=path)
  File "/home/runner/.local/lib/python3.12/site-packages/competitive_verifier/oj/verify/languages/cplusplus_bundle.py", line 286, in _resolve
    raise BundleErrorAt(path, -1, "no such header")
competitive_verifier.oj.verify.languages.cplusplus_bundle.BundleErrorAt: string/suffix_array.hpp: line -1: no such header

Test cases

Env	Name	Status	Elapsed	Memory
g++	all_same_00	AC	55 ms	21 MB
g++	all_same_01	AC	53 ms	21 MB
g++	all_same_02	AC	53 ms	21 MB
g++	all_same_03	AC	53 ms	21 MB
g++	example_00	AC	2 ms	3 MB
g++	example_01	AC	2 ms	3 MB
g++	example_02	AC	2 ms	3 MB
g++	example_03	AC	2 ms	3 MB
g++	max_large_ans_00	AC	112 ms	25 MB
g++	max_large_ans_01	AC	121 ms	26 MB
g++	max_large_ans_02	AC	114 ms	27 MB
g++	max_large_ans_03	AC	125 ms	29 MB
g++	max_random_00	AC	122 ms	25 MB
g++	max_random_01	AC	126 ms	26 MB
g++	max_random_02	AC	126 ms	28 MB
g++	max_random_03	AC	129 ms	29 MB
g++	random_00	AC	97 ms	21 MB
g++	random_01	AC	108 ms	23 MB
g++	random_02	AC	54 ms	14 MB
g++	random_03	AC	57 ms	15 MB
g++	small_00	AC	2 ms	3 MB
g++	small_01	AC	2 ms	3 MB
g++	small_02	AC	2 ms	4 MB
g++	small_03	AC	2 ms	4 MB
g++	small_04	AC	2 ms	4 MB
g++	small_05	AC	2 ms	3 MB
g++	small_06	AC	2 ms	3 MB
g++	small_07	AC	2 ms	3 MB

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