Submission #1205406

#	Time	Username	Problem	Language	Result	Execution time	Memory
1205406		biank	Toxic Gene (NOI23_toxic)	C++20	42.89 / 100	12 ms	584 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;
int cnt=0;

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

vi perm;

int find_toxic(int l, int r){
    if(l>r) return -1;
    vi vec(r-l+1);
    forsn(i,l,r+1) vec[i-l]=perm[i];
    if(query(vec)==r-l+1) return -1;
    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;
    }
    return hi;
}

vi find_all_toxic(int l, int r){
    int first=find_toxic(l,r);
    if(first==-1) return {};
    vi ret=find_all_toxic(first+1,r);
    ret.pb(perm[first]);
    return ret;
}

const int k=10;

void determine_type(int n){
    memo.clear();
    perm=vi(n);
    forn(i,n) perm[i]=i+1;
    srand(time(0)^clock());
    random_shuffle(all(perm));
    int t=find_toxic(0,n-1);
    t=perm[t];
    answer_type(t,'T');
    queue<int> q;
    forsn(i,1,n+1){
        if(i!=t) q.push(i);
    }
    vi v;
    while(!q.empty()){
        vi type(8,-1);
        forn(i,8){
            if(q.empty()) break;
            type[i]=q.front(); q.pop();
        }
        vi sample{t};
        forn(i,8) if(type[i]!=-1){
            forn(_,1<<i) sample.eb(type[i]);
        }
        int x=query(sample);
        forn(i,8) if(type[i]!=-1){
            if(x>>i&1) answer_type(type[i],'S');
            else v.pb(type[i]);
        }
    }
    perm=v;
    random_shuffle(all(perm));
    vi toxic;
    for(int l=0,r=l+k-1;l<sz(perm);l=r+1,r=l+k-1){
        for(int x:find_all_toxic(l,min(r,sz(perm)-1))) toxic.pb(x);
    }
    sort(all(toxic));
    for(int x:toxic) answer_type(x,'T');
    int j=0;
    sort(all(v));
    forn(i,sz(v)){
        if(j<sz(toxic)&&v[i]==toxic[j]) j++;
        else answer_type(v[i],'R');
    }
}

• Subtask 1: 42.8941 / 100