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#include "../util.h"
#include <string/suffixTree.cpp>
vector<string> naive(string_view s) {
vector<string> res(sz(s));
for (ll i = 0; i < sz(s); i++) {
res[i] = s.substr(i);
}
return res;
}
void stress_test() {
ll queries = 0;
for (int i = 0; i < 10'000; i++) {
int n = Random::integer<int>(1, 15);
auto s = Random::string(n, "abc") + "#";
SuffixTree st(s);
vector<string> got(n + 1);
auto dfs = [&](auto&& self, string pref, ll node) -> void {
auto& [l, r, _, next] = st.tree[node];
if (l >= 0) pref += s.substr(l, r - l);
if (pref.back() == '#') got[n + 1 - sz(pref)] = pref;
for (auto [__, j] : next) {
self(self, pref, j);
}
};
dfs(dfs, "", 0);
auto expected = naive(s);
if (got != expected) cerr << "error" << FAIL;
queries += n;
}
cerr << "tested random queries: " << queries << endl;
}
constexpr int N = 200'000;
void performance_test() {
timer t;
auto s = Random::string(N, "a") + Random::string(N, "ab") + Random::string(N, "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789$#");
t.start();
SuffixTree st(s);
t.stop();
hash_t hash = sz(st.tree);
if (t.time > 500) cerr << "too slow: " << t.time << FAIL;
cerr << "tested performance: " << t.time << "ms (hash: " << hash << ")" << endl;
}
int main() {
stress_test();
performance_test();
}
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