Submission #940951

#	Time	Username	Problem	Language	Result	Execution time	Memory
940951		Tuanlinh123	Toxic Gene (NOI23_toxic)	C++17	44.19 / 100	6 ms	600 KiB

toxic

#include "toxic.h"
#include<bits/stdc++.h>
#define ll int
#define pll pair<ll, ll>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define ld long double
#define sz(a) ((ll)(a).size())
using namespace std;
mt19937_64 rng(11092001);

void determine_type(ll n)
{
    ll lo=1, hi=n;
    auto queryrange=[&](ll l, ll r)
    {
        vector <ll> ask(r-l+1);
        iota(ask.begin(), ask.end(), l);
        return query_sample(ask);
    };
    while (hi>lo)
    {
        ll mid=(lo+hi)/2;
        if (queryrange(lo, mid)==mid-lo+1)
            lo=mid+1;
        else hi=mid;
    }
    vector <char> ans(n+1, 0); ans[lo]='T';
    ll sum=queryrange(1, n);
    for (ll i=1; i<=n; i+=8)
    {
        if (!sum) break;
        vector <ll> ask; ask.pb(lo);
        for (ll j=i; j<=n && j<i+8; j++)
            for (ll k=0; k<1<<(j-i); k++)
                ask.pb(j);
        ll x=query_sample(ask);
        for (ll j=i; j<=n && j<i+8; j++)
            if (x&1<<(j-i))
                ans[j]='S', sum--;
    }
    vector <ll> idx;
    for (ll i=1; i<=n; i++)
        if (!ans[i])
            idx.pb(i);
    shuffle(idx.begin(), idx.end(), rng);
    auto queryran=[&](ll l, ll r)
    {
        vector <ll> ask;
        for (ll i=l; i<r; i++)
            ask.pb(idx[i]);
        return query_sample(ask);
    };
    ll len=8;
    for (ll i=0; i<sz(idx); i+=len)
    {
        ll p=i, en=min(sz(idx), i+len);
        while (1)
        {
            if (p==en) break;
            if (queryran(p, en)) break;
            ll lo=p, hi=en-1;
            while (hi>lo)
            {
                ll mid=(lo+hi)/2;
                if (queryran(p, mid+1)) lo=mid+1;
                else hi=mid;
            }
            ans[idx[lo]]='T', p=lo+1;
        }
    }
    for (ll i=1; i<=n; i++)
    {
        if (ans[i]==0) answer_type(i, 'R');
        else answer_type(i, ans[i]);
    }
}

• Subtask 1: 44.18823529 / 100