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#include "../util.h"
#include <datastructures/waveletTree.cpp>
constexpr int N = 1000'000;
void stress_test() {
ll queries = 0;
for (int tries = 0; tries < 100; tries++) {
int n = Random::integer<int>(10, 100);
vector<ll> naive = Random::integers<ll>(n, -1000, 1000);
WaveletTree tree(naive);
for (int operations = 0; operations < 1000; operations++) {
{
queries++;
int l = Random::integer<int>(0, n + 1);
int r = Random::integer<int>(0, n + 1);
//if (l > r) swap(l, r);
int x = Random::integer<int>(-1, n);
ll got = tree.kth(l, r, x);
ll expected = -1;
if (x >= 0 && l + x < r) {
vector<ll> tmp(naive.begin() + l, naive.begin() + r);
std::sort(all(tmp));
expected = tmp[x];
}
if (got != expected) {
cerr << "kth, got: " << got << ", expected: " << expected << FAIL;
}
}
{
queries++;
int l = Random::integer<int>(0, n + 1);
int r = Random::integer<int>(0, n + 1);
//if (l > r) swap(l, r);
ll x = Random::integer<ll>(-1000, 1000);
ll got = tree.countSmaller(l, r, x);
ll expected = 0;
for (int j = l; j < r; j++) {
if (naive[j] < x) expected++;
}
if (got != expected) {
cerr << "count, got: " << got << ", expected: " << expected << FAIL;
}
}
}
}
cerr << "tested random queries: " << queries << endl;
}
void performance_test() {
timer t;
vector<ll> tmp = Random::integers<ll>(N, -1000, 1000);
t.start();
WaveletTree tree(tmp);
t.stop();
hash_t hash = 0;
for (int operations = 0; operations < N; operations++) {
auto [l1, r1] = Random::pair<int>(0, N + 1);
auto [l2, r2] = Random::pair<int>(0, N + 1);
int x1 = Random::integer<ll>(l1, r1 + 1);
ll x2 = Random::integer<ll>(-1000, 1000);
t.start();
hash ^= tree.kth(l1, r1, x1);
hash ^= tree.countSmaller(l2, r2, x2);
t.stop();
}
if (t.time > 2000) 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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