Submission #1047483

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047483		SN0WM4N	Rainforest Jumps (APIO21_jumps)	C++14	21 / 100	4065 ms	7348 KiB

jumps

#include "jumps.h"

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

vector<int> v;
vector<int> m_sig, m_prev;

void init(int N, std::vector<int> H) {
        v = H;
        m_sig.resize(N);
        m_prev.resize(N);

        for (int i = N - 1; i >= 0; i --) {
                m_sig[i] = i;
                m_prev[i] = i;
                for (int j = i; j < N; j ++) {
                        if (H[j] > H[i]) {
                                m_sig[i] = j;
                                break;
                        }
                }

                for (int j = i; j >= 0; j --) {
                        if (H[j] > H[i]) {
                                m_prev[i] = j;
                                break;
                        }
                }
        }
}

int minimum_jumps(int A, int B, int C, int D) {
        vector<int> vis(v.size(), 1e9);
        queue<pair<int, int>> q;

        for (int i = A; i <= B; i ++) 
                q.push({i, 0});

        while (!q.empty()) {
                auto [x, d] = q.front();
                q.pop();

                if (vis[x] <= d)
                        continue;

                if (C <= x && x <= D) 
                        return d;

                vis[x] = d;

                q.push({m_sig[x], d + 1});
                q.push({m_prev[x], d + 1});
        }

        return -1;
}

Compilation message (stderr)

jumps.cpp: In function 'int minimum_jumps(int, int, int, int)':
jumps.cpp:41:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   41 |                 auto [x, d] = q.front();
      |                      ^

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