Submission #969724

#	Time	Username	Problem	Language	Result	Execution time	Memory
969724		socpite	Koala Game (APIO17_koala)	C++14	71 / 100	48 ms	596 KiB

koala

#include "koala.h"
#include<bits/stdc++.h>
using namespace std;

int B[105], R[105];

int minValue(int N, int W) {
    // TODO: Implement Subtask 1 solution here.
    // You may leave this function unmodified if you are not attempting this
    // subtask.
    return 0;
}
vector<int> search_set = {1, 2, 3, 5, 6, 7, 8};

int maxValue(int N, int W) {
    vector<int> vec = {1, 2, 4, 11};
    vector<int> good(N);
    iota(good.begin(), good.end(), 0);
    for(auto v: vec){
        fill(B, B + N, 0);
        for(auto id: good)B[id] = v;
        playRound(B, R);
        good.clear();
        for(int i = 0; i < N; i++)if(R[i] > v)good.push_back(i);
    }
    return good.back();
}

int greaterValue(int N, int W) {
    int l = 0, r = 6;
    while(l <= r){
        int md = (l+r)>>1;
        int mid = search_set[md];
        B[0] = B[1] = mid;
        playRound(B, R);
        if (R[0] > mid and R[1] <= mid) return 0;
        if (R[1] > mid and R[0] <= mid) return 1;
        if(R[0] > mid && R[1] > mid)l = md + 1;
        else r = md - 1;
    }
    return 0;

    // k p0 <= sum (k+1)so dau tien < p1
}

int n;

int bound[9][2] = {
    {0, 0},
    {0, 4},
    {2, 10},
    {5, 19},
    {9, 31},
    {14, 46},
    {20, 64},
    {27, 85},
    {35, 101}
};

int cbound[105][2];

int cnt[105][2];
bool recmp[105][105];
int ans[105];

bool cmp(int a, int b){
    assert(a != b);
    if(recmp[a][b])return 1;
    if(recmp[b][a])return 0;
    int la = max(cnt[a][0] - 1, cbound[a][0]), ra = min(100 - cnt[a][1], cbound[a][1]);
    int lb = max(cnt[b][0] - 1, cbound[b][0]), rb = min(100 - cnt[b][1], cbound[b][1]);
    if(la >= rb){
        cnt[a][0]++;
        cnt[b][1]++;
        recmp[b][a] = 1;
        return 0;
    }
    if(lb >= ra){
        recmp[a][b] = 1;
        cnt[b][0]++;
        cnt[a][1]++;
        return 1;
    }
    int l = -1, r = -1;
    for(int i = 0; i < 7; i++){
        if(bound[search_set[i]][0] >= min(ra, rb) || bound[search_set[i]][1] <= max(la, lb))continue;
        if(l == -1)l = i;
        r = i;
    }
    while(l <= r){
        int md = (l+r)>>1;
        int mid = search_set[md];
        fill(B, B+n, 0);
        B[a] = B[b] = mid;
        playRound(B, R);
        // cout << mid << " " << R[a] << " " << R[b] << endl;
        if (R[a] > mid and R[b] <= mid) {
            cnt[a][0]++;
            cnt[b][1]++;
            recmp[b][a] = 1;
            return 0;
        }
        if (R[b] > mid and R[a] <= mid) {
            cnt[b][0]++;
            cnt[a][1]++;
            recmp[a][b] = 1;
            return 1;
        }
        if(R[a] > mid && R[b] > mid){
            l = md + 1;
            cbound[a][0] = max(cbound[a][0], bound[mid][1]);
            cbound[b][0] = max(cbound[b][0], bound[mid][1]);
        }
        else {
            r = md - 1;
            cbound[a][1] = min(cbound[a][1], bound[mid][0]);
            cbound[b][1] = min(cbound[b][1], bound[mid][0]);
        }
    }
    assert(false);
    return 0;
}

bool cmp_subtask_4(int a, int b){
    fill(B, B+n, 0);
    B[a] = B[b] = n;
    playRound(B, R);
    return R[a] < R[b];
}

mt19937 rng_lmao(69420);

void allValues(int N, int W, int *P) {
    n = N;
    if (W == 2*N) {
        vector<int> vec(N);
        iota(vec.begin(), vec.end(), 0);
        stable_sort(vec.begin(), vec.end(), cmp_subtask_4);
        for(int i = 0; i < N; i++)P[vec[i]] = i+1;
    } else {
        for(int i = 0; i < N; i++)cbound[i][1] = 101;
        vector<int> vec(N);
        iota(vec.begin(), vec.end(), 0);
        shuffle(vec.begin(), vec.end(), rng_lmao);
        sort(vec.begin(), vec.end(), cmp);
        for(int i = 0; i < N; i++)P[vec[i]] = i+1;
        
    }
}

• Subtask 1: 0 / 4
• Subtask 2: 15 / 15
• Subtask 3: 18 / 18
• Subtask 4: 10 / 10
• Subtask 5: 28 / 53