Submission #1202320

#	Time	Username	Problem	Language	Result	Execution time	Memory
1202320		jer033	밀림 점프 (APIO21_jumps)	C++20	33 / 100	4101 ms	33292 KiB

jumps

#include "jumps.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
const int INF = 500'005;

int n;
vector<vector<int>> edgelist;

void init(int N, std::vector<int> H) {
    n = N;
    edgelist = vector<vector<int>> (N+2);
    set<int> trees;
    trees.insert(0);
    trees.insert(N+1);
    set<int> hanging_trees;
    hanging_trees.insert(0);
    hanging_trees.insert(-N-1);

    vector<pii> heightmap;
    for (int i=0; i<N; i++)
        heightmap.push_back({H[i], i+1});
    sort(heightmap.begin(), heightmap.end());
    for (int ind=N-1; ind>=0; ind--)
    {
        int next_tall = heightmap[ind].second;
        edgelist[next_tall].push_back(0 - *(hanging_trees.lower_bound(0-next_tall)));
        edgelist[next_tall].push_back(    *(        trees.lower_bound(  next_tall)));
        hanging_trees.insert(0-next_tall);
        trees.insert(next_tall);
    }
}

int minimum_jumps(int A, int B, int C, int D) {
    A++; B++; C++; D++;
    vector<int> dists(n+2, INF);
    queue<int> qq;
    for (int i=A; i<=B; i++)
    {
        dists[i] = 0;
        qq.push(i);
    }
    while (!qq.empty())
    {
        int x = qq.front();
        qq.pop();
        for (int y: edgelist[x])
            if (dists[y]==INF)
            {
                dists[y] = dists[x]+1;
                qq.push(y);
                if ((C<=y) and (y<=D))
                    return dists[y];
            }
    }
    return -1;
}

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