Submission #1051518

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051518		Pacybwoah	How to Avoid Disqualification in 75 Easy Steps (CEOI23_avoid)	C++17	0 / 100	1 ms	716 KiB

avoid

#include "avoid.h"
#include <vector>
#include<algorithm>
#include<random>
#include<chrono>
#include<utility>
#include<cassert>
#include<iostream>
#include<set>
using namespace std;
auto seed = chrono::high_resolution_clock::now().time_since_epoch().count();
mt19937 mt(seed);
// send(), wait()
std::pair<int, int> scout(int R, int H) {
    vector<bool> poss(1001, 1);
    int now = 0;
    R = 56;
    vector<vector<int>> asked;
    set<pair<int, int>> s;
    while(now <= R - 4){
        int a, b;
        if(now < 20){
            a = now / 2;
            b = now / 2 + 1;
        }
        else{
            uniform_int_distribution<int> dis(0, 9);
            a = dis(mt);
            b = dis(mt);
            if(a == b) continue;
            if(a > b) swap(a, b);
            if(s.count(make_pair(a, b))) continue;
        }
        now += 4;
        s.insert(make_pair(a, b));
        vector<int> a00, a01, a10, a11;
        for(int i = 1; i <= 1000; i++){
            if(i & (1 << a)){
                if(i & (1 << b)) a11.push_back(i);
                else a10.push_back(i);
            }
            else{
                if(i & (1 << b)) a01.push_back(i);
                else a00.push_back(i);
            }
        }
        asked.push_back(a00);
        send(a00);
        asked.push_back(a01);
        send(a01);
        asked.push_back(a10);
        send(a10);
        asked.push_back(a11);
        send(a11);
    }
    auto res = wait();
    int sz = res.size();
    for(int i = 0; i < sz; i++){
        if(res[i] == 0){
            for(auto &x: asked[i]) poss[x] = 0;
        }
    }
    pair<int, int> ans;
    vector<int> anss;
    for(int i = 1; i <= 1000; i++) if(poss[i]) anss.push_back(i);
    if(anss.size() == 1) ans.first = anss[0], ans.second = anss[0];
    else ans.first = anss[1], ans.second = anss[0];
    return ans;
}
// g++ -std=c++17 -o run ceoi23_d2C_grader.cpp ceoi23_d2C.cpp -fsanitize=undefined -fsanitize=address -Wall -Wextra -Wshadow

• Subtask 0: 0 / 0
• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 10
• Subtask 4: 0 / 75