Submission #952118

#	Time	Username	Problem	Language	Result	Execution time	Memory
952118		gaga999	Toxic Gene (NOI23_toxic)	C++17	100 / 100	182 ms	868 KiB

toxic

// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx,avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#define lowbit(x) ((x) & -(x))
#define ml(a, b) ((1ll * (a) * (b)) % M)
#define tml(a, b) (a) = ((1ll * (a) * (b)) % M)
#define ad(a, b) ((0ll + (a) + (b)) % M)
#define tad(a, b) (a) = ((0ll + (a) + (b)) % M)
#define mi(a, b) ((0ll + M + (a) - (b)) % M)
#define tmi(a, b) (a) = ((0ll + M + (a) - (b)) % M)
#define tmin(a, b) (a) = min((a), (b))
#define tmax(a, b) (a) = max((a), (b))
#define iter(a) (a).begin(), (a).end()
#define riter(a) (a).rbegin(), (a).rend()
#define init(a, b) memset((a), (b), sizeof(a))
#define cpy(a, b) memcpy((a), (b), sizeof(a))
#define uni(a) a.resize(unique(iter(a)) - a.begin())
#define size(x) (int)x.size()
#define pb emplace_back
#define mpr make_pair
#define ls(i) ((i) << 1)
#define rs(i) ((i) << 1 | 1)
#define INF 0x3f3f3f3f
#define NIF 0xc0c0c0c0
#define eps 1e-9
#define F first
#define S second
#define AC cin.tie(0)->sync_with_stdio(0)
using namespace std;
typedef long long llt;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef pair<llt, llt> pll;
typedef complex<double> cd;
// const int M = 998244353;

// random_device rm;
// mt19937 rg(rm());
// default_random_engine rg(rm());
// uniform_int_distribution<int> rd(INT_MIN, INT_MAX);
// uniform_real_distribution<double> rd(0, M_PI);

void db() { cerr << "\n"; }
template <class T, class... U>
void db(T a, U... b) { cerr << a << " ", db(b...); }

inline char gc()
{
    const static int SZ = 1 << 16;
    static char buf[SZ], *p1, *p2;
    if (p1 == p2 && (p2 = buf + fread(p1 = buf, 1, SZ, stdin), p1 == p2))
        return -1;
    return *p1++;
}
void rd() {}
template <typename T, typename... U>
void rd(T &x, U &...y)
{
    x = 0;
    bool f = 0;
    char c = gc();
    while (!isdigit(c))
        f ^= !(c ^ 45), c = gc();
    while (isdigit(c))
        x = (x << 1) + (x << 3) + (c ^ 48), c = gc();
    f && (x = -x), rd(y...);
}

template <typename T>
void prt(T x)
{
    if (x < 0)
        putchar('-'), x = -x;
    if (x > 9)
        prt(x / 10);
    putchar((x % 10) ^ 48);
}

// int query_sample(vector<int> species){};
// void answer_type(int x, char c){};
int query_sample(vector<int> species);
void answer_type(int x, char c);

double dp[305][35];
int fr[305][35]; // remain curlen num

void determine_type(int n)
{
    mt19937 rnd(time(NULL));
    for (int nn = 1; nn <= 300; nn++)
    {
        for (int k = 1; k <= 30; k++)
        {
            dp[nn][k] = INF;
            for (int t = 0; 1 << t <= nn; t++)
            {
                int l = 1 << t;
                double rt = dp[nn - 1][k - 1] + t + 1;
                double rn = dp[nn - l][k] + 1;
                double res;
                // if (rn > rt)
                //     res = rn;
                // else
                // {
                if (nn - k < l)
                    res = rt;
                else
                {
                    double p = pow((nn - k - l / 2) / double(nn), l);
                    res = rn * p + rt * (1 - p);
                }
                //}
                if (res <= dp[nn][k]) //<=
                    dp[nn][k] = res, fr[nn][k] = l;
            }
        }
    }
    int k = min(30, n), pos = 0;
    vector<int> qs, cr(n), ans(n + 1);
    vector<bool> vd(n + 1);
    iota(iter(cr), 1);
    int bad = 0;
    auto del = [&](const vector<int> &qy) -> void
    {
        for (int i : qy)
        {
            assert(!vd[i]);
            if (!ans[i])
                qs.pb(i);
            else
            {
                vd[i] = 1;
                char c = ans[i] > 0 ? 'R' : 'S';
                // assert(str[i - 1] == c);
                answer_type(i, c);
            }
        }
    };
    auto qry = [&](const vector<int> &qy) -> int
    {
        assert(bad++ < 301);
        int ln = size(qy), res = 0;
        if (ln > 8)
            res = query_sample(qy);
        else
        {
            vector<int> tp;
            for (int i = 0; i < ln; i++)
                for (int j = 1 << i; j > 0; j--)
                    tp.pb(qy[i]);
            shuffle(iter(qs), rnd);
            int kk = min(8 - ln, size(qs));
            vector<int> ck(kk);
            for (int i = 0; i < kk; i++)
            {
                assert(!qs.empty());
                ck[i] = qs.back(), qs.pop_back();
                for (int j = 1 << (i + ln); j > 0; j--)
                    tp.pb(ck[i]);
            }
            int re = query_sample(tp);
            for (int i = 0; i < ln; i++)
                if ((re >> i) & 1)
                    res++;
            if (res != ln)
            {
                for (int i = 0; i < ln; i++)
                {
                    // assert(!vd[qy[i]]);
                    if ((re >> i) & 1)
                    {
                        assert(!vd[qy[i]]);
                        // assert(str[qy[i] - 1] == 'S');
                        answer_type(qy[i], 'S'), vd[qy[i]] = 1;
                    }
                    else
                        ans[qy[i]] = 1;
                }
                for (int i = 0; i < kk; i++)
                {
                    // assert(!vd[ck[i]]);
                    char c = ((re >> (i + ln)) & 1) ? 'S' : 'R';
                    // assert(str[ck[i] - 1] == c);
                    assert(!vd[ck[i]]);
                    answer_type(ck[i], c);
                    re &= ~(1 << (i + ln)), vd[ck[i]] = 1;
                }
            }
            else
                for (int i = 0; i < kk; i++)
                    qs.pb(ck[i]);
        }
        if (!res)
            for (int i : qy)
                ans[i] = 1;
        if (res == ln - 1)
            for (int i : qy)
                ans[i] = -1;
        return res;
    };
    auto slv = [&](auto &slv, vector<int> &qy) -> void
    {
        for (int i : qy)
            assert(!vd[i]);
        if (size(qy) == 1)
        {
            // db("okk");
            assert(!vd[qy[0]]);
            // assert(str[qy[0] - 1] == 'T');
            answer_type(qy[0], 'T');
            vd[qy[0]] = 1, pos = qy[0];
            return;
        }
        shuffle(iter(qy), rnd);
        vector<int> tp;
        while (size(qy) > size(tp))
            tp.pb(qy.back()), qy.pop_back();
        int ln = size(tp);
        int res = qry(tp);
        if (res == ln)
        {
            for (int i : tp)
                assert(!vd[i]);
            del(tp), slv(slv, qy);
        }
        else
        {
            for (int i : qy)
                cr.pb(i);
            qy.clear();
            for (int i : tp)
                if (!vd[i])
                    qy.pb(i);
            slv(slv, qy);
        }
    };
    while (!cr.empty())
    {
        int ln = min(size(cr), 8); // fr[size(cr)][k];
        assert(ln <= size(cr));    //
        shuffle(iter(cr), rnd);
        vector<int> tp(ln);
        for (int i = 0; i < ln; i++)
            tp[i] = cr.back(), cr.pop_back();
        int res = qry(tp);
        if (res == ln)
        {
            // db("delll", ln, size(cr), k);
            for (int i : tp)
                assert(!vd[i]);
            del(tp);
        }
        else
        {
            // db("find t");
            vector<int> qq;
            for (int i : tp)
                if (!vd[i])
                    qq.pb(i);
            // assert(bad - pbad <= log2(ln));
            slv(slv, qq);
            if (!--k)
                break;
        }
    }
    // assert(str[pos - 1] == 'T');
    for (int i : cr)
        qs.pb(i);
    bad = 0;
    while (!qs.empty())
        qry(vector<int>(1, pos));
    // for (int i = 1; i <= n; i++)
    //     assert(vd[i]);
    assert(pos);
}

// signed main() {}

• Subtask 1: 100 / 100