Submission #1148904

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148904		fatman87878	Toxic Gene (NOI23_toxic)	C++20	41.08 / 100	6 ms	328 KiB

toxic

#include "toxic.h"
#include<bits/stdc++.h>
using namespace std;
#define IOS cin.tie(nullptr)->sync_with_stdio(0),cin.exceptions(cin.failbit);
#define lb(x) (x)&-(x)
#define all(x) (x).begin(),(x).end()
#define ll long long

constexpr int blk = 8;

void determine_type(int n){
	mt19937 rng(time(0));
	int toxic;
	vector<int> idx(n),nottoxic,isstrong(n+1),istoxic(n+1);
	iota(all(idx),1);
	shuffle(all(idx),rng);
    int l0 = 0,r0 = n;
    for(;l0+1<r0;){
        int mid=l0+r0>>1;
		if(query_sample(vector(idx.begin(),idx.begin()+mid))==mid)l0=mid;
		else r0=mid;
    }
	istoxic[toxic = idx[l0]]=1;
	idx.erase(idx.begin()+l0);
	for(;!idx.empty();){
		int R = min((int)idx.size(),blk);
		vector<int> ask(1,toxic);
		for(int cnt = 0,k = 0;k<R;k++,cnt++){
			for(int j = 0;j<1<<cnt;j++)ask.emplace_back(idx[k]);
		}
		int ret = query_sample(ask);
		ask.clear();
		for(int k = R;k--;){
			if(ret>>k&1)isstrong[idx[k]] = 1,idx.erase(idx.begin()+k);
			else ask.emplace_back(idx[k]);
		}
		reverse(all(ask));
		int l = 0,r = ask.size();
		if(!ask.size()||query_sample(ask))l=ask.size()-1;
		else {
			for(;l+1<r;){
				int mid=l+r>>1;
				if(query_sample(vector(ask.begin(),ask.begin()+mid)))l=mid;
				else r=mid;
			}
			istoxic[ask[l]]=1;
		}
		for(;l>=0;l--)idx.erase(idx.begin());
	}
	for(int i = 1;i<=n;i++){
		if(istoxic[i])answer_type(i,'T');
		else if(isstrong[i])answer_type(i,'S');
		else answer_type(i,'R');
	}
}

// g++ -DEVAL -std=gnu++17 -O2 -pipe -static -s -o toxic stub.cpp toxic.cpp

• Subtask 1: 41.0824 / 100