제출 #521595

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
521595		qwerasdfzxcl	Park (JOI17_park)	C++14	10 / 100	417 ms	656 KiB

park

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

using namespace std;
typedef long long ll;

static int Place[1400];
int a[2020];

int ask(int x, int y){return Ask(min(x, y), max(x, y), Place);}
void answer(int x, int y){Answer(min(x, y), max(x, y));}

bool cmp(int x, int y){
    fill(Place, Place+1400, 1);
    Place[y] = 0;
    if (!ask(0, x)) return 0;
    return 1;
}

int tmp[2020];
void _sort(int l, int r){
    if (l>=r) return;
    int m = (l+r)>>1;
    _sort(l, m); _sort(m+1, r);

    int pt = m+1, cnt = l;
    for (int i=l;i<=m;i++){
        while(pt<=r && !cmp(a[i], a[pt])){
            tmp[cnt] = a[pt];
            pt++, cnt++;
        }
        tmp[cnt] = a[i];
        cnt++;
    }
    while(pt<=r){
        tmp[cnt] = a[pt];
        pt++, cnt++;
    }

    for (int i=l;i<=r;i++) a[i] = tmp[i];
}

vector<int> D[2020];
int mxdep = 0;

int getdep(int x){
    fill(Place, Place+1400, 0);
    Place[x] = 1;

    int l = 0, r = mxdep, ret = mxdep;
    while(l<=r){
        int m = (l+r)>>1;
        for (int i=0;i<=m;i++) {
            for (auto &x:D[i]) Place[x] = 1;
        }

        if (ask(0, x)) ret = m, r = m-1;
        else l = m+1;

        for (int i=0;i<=m;i++) {
            for (auto &x:D[i]) Place[x] = 0;
        }
    }
    if (ret==mxdep) mxdep++;
    D[ret+1].push_back(x);
    return ret+1;
}

void Find(int x, int dep){
    fill(Place, Place+1400, 0);
    Place[x] = 1;
    --dep;

    for (int i=0;i<=dep-1;i++){
        for (auto &x:D[i]) Place[x] = 1;
    }

    int pos = 0;
    for (int z=1;z<(int)D[dep].size();z<<=1){
        for (int i=0;i<(int)D[dep].size();i++) if (i&z) Place[D[dep][i]] = 1;

        if (ask(0, x)) pos |= z;

        for (int i=0;i<(int)D[dep].size();i++) if (i&z) Place[D[dep][i]] = 0;
    }
    answer(D[dep][pos], x);

    for (int i=0;i<=dep-1;i++){
        for (auto &x:D[i]) Place[x] = 0;
    }
}

void Detect(int T, int N) {
    for (int i=1;i<N;i++) a[i] = i;
    _sort(1, N-1);

    D[0].push_back(0);
    for (int i=1;i<N;i++){
        int dep = getdep(a[i]);
        //printf("dep = %d, mxdep = %d\n", dep, mxdep);
        Find(a[i], dep);
    }
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 27
• Subtask 4: 0 / 30
• Subtask 5: 0 / 23