algo/utils/rng.h

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• Last update: 2026-07-26 15:26:45-04:00

Depends on

• algo/common.h

Code

#pragma once
#include "algo/common.h"

namespace algo::random {

uint64_t rng() {
    static std::mt19937_64 rng(
        std::chrono::steady_clock::now().time_since_epoch().count());
    return rng();
}

} // namespace algo::random

#line 2 "algo/common.h"
#ifndef PREPROCESS
#include <bits/stdc++.h>
#include <cassert>
#endif

namespace algo {

// Indices and sizes into library containers. Signed, so the usual "walk down to
// -1" loops still terminate; widening the whole library is a change here alone.
using index_t = int;

} // namespace algo
#line 3 "algo/utils/rng.h"

namespace algo::random {

uint64_t rng() {
    static std::mt19937_64 rng(
        std::chrono::steady_clock::now().time_since_epoch().count());
    return rng();
}

} // namespace algo::random

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