Submission #250925

#	Time	Username	Problem	Language	Result	Execution time	Memory
250925		receed	Koala Game (APIO17_koala)	C++14	100 / 100	96 ms	512 KiB

koala

#include "koala.h"
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cstring>
#include <cassert>
#include <string>
#include <set>
#include <map>
#include <random>
#include <bitset>
#include <string>
#include <unordered_set>
#include <unordered_map>
#include <deque>
#include <queue>
#define rep(i, n) for (int i = 0; i < (n); i++)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

using namespace std;
using ll = long long;
using ul = unsigned long long;
using ld = long double;

int cache[2][205];
int num[2][205];
char taken[105][205];

const int N = 100;
int W = 200;
int b[N], r[N], tk[N], val[N];

void solve() {
    int i, j;
    for (i=0;i<205;++i) {
        cache[1][i] = 0;
        num[1][i] = 0;
    }

    for (i=0;i<N;++i) {
        int v = b[i]+1;
        int ii = i&1;
        int o = ii^1;
        for (j=0;j<=W;++j) {
            cache[ii][j] = cache[o][j];
            num[ii][j] = num[o][j];
            taken[i][j] = 0;
        }
        for (j=W;j>=v;--j) {
            int h = cache[o][j-v] + val[i];
            int hn = num[o][j-v] + 1;
            if (h > cache[ii][j] || (h == cache[ii][j] && hn > num[ii][j])) {
                cache[ii][j] = h;
                num[ii][j] = hn;
                taken[i][j] = 1;
            } else {
                taken[i][j] = 0;
            }
        }
    }
    int cur = W;
    for (i=N-1;i>=0;--i) {
        int cr = taken[i][cur] ? (b[i] + 1) : 0;
        cur -= cr;
        if (cr)
            tk[i] = 1;
        else
            tk[i] = 0;
    }
}

int minValue(int n, int w) {
    b[0] = 1;
    playRound(b, r);
    rep(i, n)
        if (r[i] <= b[i])
            return i;
    return 0;
}

int maxValue(int n, int w) {
    vector<int> a(n), na;
    rep(i, n)
        a[i] = i;
    while (a.size() > 1) {
        int cw = w / a.size();
        rep(i, n)
            b[i] = 0;
        for (int i : a)
            b[i] = cw;
        playRound(b, r);
        na.clear();
        for (int i : a)
            if (r[i] > cw)
                na.push_back(i);
        a = na;
    }
    assert(!a.empty());
    return a[0];
}

int greaterValue(int n, int w) {
    int l = 0, rr = 6, m;
    vector<int> a {1, 2, 3, 4, 5, 6, 8};
    while (1) {
        m = (l + rr) / 2;
        b[0] = b[1] = a[m];
        playRound(b, r);
        if (r[0] > a[m] && r[1] > a[m]) {
            assert(l != rr);
            l = m + 1;
        }
        else if (r[0] <= a[m] && r[1] <= a[m]) {
            assert(l != rr);
            rr = m - 1;
        }
        else
            return r[0] < r[1];
    }
    return -1;
}

void go(int l, int cr, vector<int> lp) {
    // cout << l << ' '<< cr << endl;
    if (cr - l <= 1)
        return;
    rep(i, N)
        b[i] = 0;
    for (int i : lp)
        b[i] = W / lp.size();
    while (1) {
        assert(b[lp[0]] > 0);
        solve();
        if (tk[lp[0]] != tk[lp.back()]) {
            playRound(b, r);
            vector<int> l1, l2;
            int c1 = l;
            for (int i : lp) {
                if (r[i] > b[i])
                    l2.push_back(i);
                else
                    l1.push_back(i);
            }
            assert(!l1.empty() && !l2.empty());
            for (int i : l1)
                val[i] = c1++;
            for (int i : l2)
                val[i] = c1++;
            go(l + l1.size(), cr, l2);
            go(l, l + l1.size(), l1);
            return;
        }
        for (int i : lp)
            b[i]--;
    }
}

void allValues(int n, int w, int *p) {
    W = w;
    rep(i, n)
        val[i] = i + 1;
    vector<int> lp(n);
    rep(i, n)
        lp[i] = i;
    go(1, n + 1, lp);
    rep(i, n)
        p[i] = val[i];
    if (w == 2*n) {
        // TODO: Implement Subtask 4 solution here.
        // You may leave this block unmodified if you are not attempting this
        // subtask.
    } else {
        // TODO: Implement Subtask 5 solution here.
        // You may leave this block unmodified if you are not attempting this
        // subtask.
    }
}

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