제출 #624660

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
624660		Awerar	버섯 세기 (IOI20_mushrooms)	C++14	92.24 / 100	113 ms	764 KiB

mushrooms

#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <limits.h>
#include <math.h>
#include <chrono>
#include <queue>
#include <stack>
#include <algorithm>

using namespace std;

#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")

#define ll long long
#define vi vector<ll>
#define vvi vector<vi>
#define p2 pair<ll, ll>
#define p3 tuple<ll,ll,ll>
#define p4 vi
#define ip3 tuple<int,int,int>
#define ip4 tuple<int,int,int,int>
#define vp2 vector<p2>
#define vp3 vector<p3>
#define inf 2e9
#define linf 1e17

#define read(a) cin >> a
#define write(a) cout << (a) << "\n"
#define dread(type, a) type a; cin >> a
#define dread2(type, a, b) dread(type, a); dread(type, b)
#define dread3(type, a, b, c) dread2(type, a, b); dread(type, c)
#define dread4(type, a, b, c, d) dread3(type, a, b, c); dread(type, d)
#define dread5(type, a, b, c, d, e) dread4(type, a, b, c, d); dread(type, e)
#ifdef _DEBUG
#define deb __debugbreak();
#else
#define deb ;
#endif

#define rep(i, high) for (ll i = 0; i < high; i++)
#define repp(i, low, high) for (ll i = low; i < high; i++)
#define repe(i, container) for (auto& i : container)
#define per(i, high) for (ll i = high; i >= 0; i--)

#define readpush(type,vect) type temp; read(temp); vect.push_back(temp);
#define readvector(type, name, size) vector<type> name(size); rep(i,size) {dread(type,temp); name[i]=temp;}
#define readinsert(type,a) {type temp; read(temp); a.insert(temp);}
#define all(a) begin(a),end(a)
#define setcontains(set, x) (set.find(x) != set.end())
#define stringcontains(str, x) (str.find(x) != string::npos)
#define within(a, b, c, d) (a >= 0 && a < b && c >= 0 && c < d)

#define ceildiv(x,y) ((x + y - 1) / y)
#define fract(a) (a-floor(a))
#define sign(a) ((a>0) ? 1 : -1)

auto Start = chrono::high_resolution_clock::now();

inline void fast()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
}

int use_machine(vector<int> x);

int submit_query(vector<int> x) {
    cerr << "x = {";
    for(int v : x) cerr << v << ", ";
    cerr << "}\n";

    return use_machine(x);
}

vector<int> apos = { 0 }, bpos;
int num_checked = 1, a_count = 1;
int n;

int get_num_to_discover() {
    return (apos.size() < 2 && bpos.size() < 2) || n - num_checked < 2 ? 1 : 2;
}

int get_num_to_count() {
    return min(n - num_checked, (int)max(apos.size(), bpos.size()));
}

void discover() {
    if(get_num_to_discover() == 1) {
        cerr << "Discover 1" << endl;

        int res = submit_query({ 0, num_checked });
        
        (res == 0 ? apos : bpos).push_back(num_checked);
        if(res == 0) a_count++;

        num_checked++;
    } else {
        cerr << "Discover 2" << endl;

        bool a_used = apos.size() > bpos.size();
        vector<int>& arr = a_used ? apos : bpos;

        int res = submit_query({ arr[0], num_checked, arr[1], num_checked + 1 });

        pair<bool, bool> same;
        if(res == 0) same = { true, true };
        else if(res == 1) same = { true, false };
        else if(res == 2) same = { false, true };
        else same = { false, false };

        if(a_used ^ same.first) {
            bpos.push_back(num_checked);
        } else {
            apos.push_back(num_checked);
            a_count++;
        }
        
        if(a_used ^ same.second) {
            bpos.push_back(num_checked + 1);
        } else {
            apos.push_back(num_checked + 1);
            a_count++;
        }

        num_checked += 2;
    }
}

void count() {
    cerr << "Counting" << endl;
    
    bool a_used = apos.size() > bpos.size();
    vector<int>& arr = a_used ? apos : bpos;

    int num_query = get_num_to_count();
    vector<int> q;
    for(int i = 0; i < num_query; i++) {
        q.push_back(arr[i]);
        q.push_back(num_checked + i);
    }

    int res = submit_query(q);
    int num_same = num_query - ceildiv(res, 2);

    num_checked += num_query;

    if(a_used) a_count += num_same;
    else a_count += num_query - num_same;

    if((res % 2 == 1) ^ a_used) apos.push_back(num_checked - 1);
    else bpos.push_back(num_checked - 1);
}

int count_mushrooms(int N) {
    n = N;

    int k = 69;
    while(num_checked < n) {
        int end_now = ceildiv((n - num_checked), max(apos.size(), bpos.size()));
        
        //int worst_a = apos.size(), worst_b = bpos.size();
        int num_to_discover = get_num_to_discover();
        //for(int i = 0; i < num_to_discover; i++) (worst_a < worst_b ? worst_a : worst_b)++;

        int end_next = 1 + ceildiv((n - num_checked - num_to_discover), (max(apos.size(), bpos.size()) + 1));

        k--;
        if(k == 0) break;
        if(end_now < end_next) break;

        cerr << "Checked: " << num_checked << endl;
        discover();
    }

    while(num_checked < n) {
        count();
    }

    return a_count;
}

컴파일 시 표준 에러 (stderr) 메시지

mushrooms.cpp:18: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   18 | #pragma GCC optimization ("O3")
      | 
mushrooms.cpp:19: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
   19 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 92.2449 / 100