Submission #566693

#	Time	Username	Problem	Language	Result	Execution time	Memory
566693		Ooops_sorry	Rainforest Jumps (APIO21_jumps)	C++14	0 / 100	4067 ms	5040 KiB

jumps

#include<bits/stdc++.h>
#ifndef LOCAL
    #include "jumps.h"
#endif

#define ld long double
#define ll long long
#define pb push_back

using namespace std;

const int INF = 1e9;

mt19937 rnd(51);

int n;
vector<int> h, l, r;

void init(int N, std::vector<int> H) {
    h = H;
    n = N;
    l.resize(n, -1);
    r.resize(n, n);
    deque<int> q;
    for (int i = 0; i < n; i++) {
        while (q.size() > 0 && h[q.back()] < h[i]) {
            r[q.back()] = i;
            q.pop_back();
        }
        q.pb(i);
    }
    q.clear();
    for (int i = n - 1; i >= 0; i--) {
        while (q.size() > 0 && h[q.back()] < h[i]) {
            l[q.back()] = i;
            q.pop_back();
        }
        q.pb(i);
    }
}

int minimum_jumps(int a, int b, int c, int d) {
    int j = c, k = -1;
    for (int i = c; i <= d; i++) {
        if (h[i] > h[j]) {
            j = i;
        }
    }
    for (int i = a; i <= b; i++) {
        if (h[i] < h[j] && (k == -1 || h[i] > h[k])) {
            k = i;
        }
    }
    if (k == -1) return -1;
    int cnt = 1;
    while (r[k] < c) {
        int L = l[k], R = r[k];
        cnt++;
        if (L == -1) {
            k = R;
        } else if (R == -1) {
            k = L;
        } else {
            if (h[L] > h[R] && h[L] < h[j]) {
                k = L;
            } else {
                k = R;
            }
        }
    }
    if (r[k] == n) return -1;
    return cnt;
}

#ifdef LOCAL

int main() {
  while (1) {
    int n = rnd() % 5 + 1, q = rnd() % 10 + 1;
    vector<int> h(n);
    iota(h.begin(), h.end(), 1);
    shuffle(h.begin(), h.end(), rnd);
    init(n, h);
    cout << n << endl;
    for (auto to : h) {
        cout << to << ' ';
    }
    cout << endl;
    for (int i = 0; i < q; i++) {
        vector<int> arr(4);
        for (int j = 0; j < 4; j++) arr[j] = rnd() % n;
        if (arr[1] >= arr[2]) continue;
        cout << arr[0] << ' ' << arr[1] << ' ' << arr[2] << ' ' << arr[3] << endl;
        minimum_jumps(arr[0], arr[1], arr[2], arr[3]);
    }
    cout << "ok" << n << endl;
  }
}

#endif

• Subtask 1: 0 / 4
• Subtask 2: 0 / 8
• Subtask 3: 0 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 23
• Subtask 6: 0 / 21
• Subtask 7: 0 / 19