Submission #1205436

#	Time	Username	Problem	Language	Result	Execution time	Memory
1205436		biank	Toxic Gene (NOI23_toxic)	C++20	68.95 / 100	17 ms	596 KiB

toxic

#include <bits/stdc++.h>
#include "toxic.h"

using namespace std;

#define forn(i,n) for(int i=0;i<int(n);i++)
#define forsn(i,s,n) for(int i=int(s);i<int(n);i++)
#define dforn(i,n) for(int i=int(n)-1;i>=0;i--)
#define dforsn(i,s,n) for(int i=int(n)-1;i>=int(s);i--)
#define fst first
#define snd second
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()

typedef long long ll;
typedef vector<ll> vll;
typedef vector<int> vi;
typedef pair<int,int> ii;

map<vi,int> memo;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int cnt=0;

int query(vi v){
    if(memo.count(v)) return memo[v];
    return memo[v]=query_sample(v);
}

vi perm;

vi find_toxic(int l, int r, bool flag){
    if(l>r) return {};
    vi vec(r-l+1);
    forsn(i,l,r+1) vec[i-l]=perm[i];
    if(!flag&&query(vec)==r-l+1) return {};
    int lo=l-1,hi=r;
    while(hi-lo>1){
        int mid=(lo+hi)/2;
        if(query(vi(begin(vec),begin(vec)+mid-l+1))<mid-l+1) hi=mid;
        else lo=mid;
    }
    vi res=find_toxic(hi+1,r,0);
    res.pb(perm[hi]);
    return res;
}

void determine_type(int n){
    memo.clear();
    perm=vi(n);
    forn(i,n) perm[i]=i+1;
    shuffle(all(perm),rng);
    vector<vi> g1,g2;
    int j=0;
    vi v,t;
    while(j<n){
        vi type(8,-1);
        forn(i,8){
            if(j>=n) break;
            type[i]=perm[j++];
        }
        vi sample;
        forn(i,8) if(type[i]!=-1){
            forn(_,1<<i) sample.pb(type[i]);
        }
        int x=query(sample);
        if(x==sz(sample)){
            g1.pb(type);
            while(g1.back().back()==-1) g1.back().pop_back();
            continue;
        }
        vi lol;
        forn(i,8) if(type[i]!=-1){
            if(x>>i&1) answer_type(type[i],'S');
            else lol.pb(type[i]);
        }
        if(!lol.empty()){
            if(sz(lol)==1) t.pb(lol[0]),v.pb(lol[0]);
            else g2.pb(lol);
        }
    }
    for(vi g:g2){
        perm=g;
        shuffle(all(perm),rng);
        for(int x:find_toxic(0,sz(g)-1,1)) t.pb(x);
        v.insert(end(v),all(g));
    }
    assert(sz(t)>=1);
    for(vi g:g1){
        vi sample={t[0]};
        forn(i,sz(g)){
            forn(_,1<<i) sample.pb(g[i]);
        }
        int x=query(sample);
        forn(i,sz(g)){
            if(x>>i&1) answer_type(g[i],'S');
            else v.pb(g[i]);
        }
    }
    sort(all(v));
    sort(all(t));
    for(int x:t) answer_type(x,'T');
    j=0;
    forn(i,sz(v)){
        if(j<sz(t)&&t[j]==v[i]) j++;
        else answer_type(v[i],'R');
    }
}

• Subtask 1: 68.95 / 100