oj.uz

답안 #434232

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
434232 2021-06-20T18:52:34 Z emil_physmath Sky Walking (IOI19_walk) C++17
0 / 100
 1330 ms 323488 KB 
#define BUGO(x) cerr << #x << " -> " << (x) << endl;
#include "walk.h"
#include <algorithm>
#include <iostream>
#include <numeric>
#include <vector>
#include <queue>
#include <set>
#include <map>
using namespace std;
using llong = long long;

vector<pair<int, int>> nei[6900'000];
llong dist[6900'000];

const llong inf = 69'000'000'000'000'000LL;
llong Dijkstra(int s, int e)
{
    fill(dist, dist + 6900'000, inf);
    priority_queue<pair<llong, int>> q;
    q.push({dist[s] = 0, s});
    while (q.size())
    {
        int v = q.top().second;
        llong d = -q.top().first;
        q.pop();
        if (dist[v] != d) continue;
        for (auto to: nei[v])
            if (d + to.second < dist[to.first])
                q.push({-(dist[to.first] = d + to.second), to.first});
    }
    return dist[e];
}

map<int, int> nodeOf[100'000];
long long min_distance(std::vector<int> x, std::vector<int> y, std::vector<int> l, std::vector<int> r,
std::vector<int> h, int s, int e) {
    int n = x.size();
    int m = l.size();
    int nodes = 0;
    for (int i = 0; i < n; ++i)
        nodeOf[i][y[i]] = nodes++;
    nodeOf[s][0] = nodes++;
    nodeOf[e][0] = nodes++;
    bool smallTest = (n <= 50 && m <= 50) || y != vector<int>(n, y[0]);
    vector<int> towers(n);
    iota(towers.begin(), towers.end(), 0);
    sort(towers.begin(), towers.end(), [&](int l, int r) {
        return y[l] < y[r];
    });
    vector<int> bridges(m);
    iota(bridges.begin(), bridges.end(), 0);
    sort(bridges.begin(), bridges.end(), [&](int l, int r) {
        return h[l] < h[r];
    });
    set<int> activeTowers;
    for (int tch = m - 1; tch >= 0; --tch)
    {
        int j = bridges[tch];
        while (towers.size() && y[towers.back()] >= h[j]) {
            activeTowers.insert(towers.back());
            towers.pop_back();
        }
        int lt = -1;
        for (auto it = activeTowers.lower_bound(l[j]); it != activeTowers.end() && *it <= r[j]; )
        {
            int i = *it;
            if (!nodeOf[i].count(h[j]))
                nodeOf[i][h[j]] = nodes++;
            if (lt != -1) {
                int u = nodeOf[i][h[j]];
                int v = nodeOf[lt][h[j]];
                nei[u].push_back({v, x[i] - x[lt]});
                nei[v].push_back({u, x[i] - x[lt]});
            }
            lt = i;
            if (smallTest)
                ++it;
            else if (*it == l[j])
                it = activeTowers.lower_bound(r[j]);
            else
                break;
        }
    }
    for (int i = 0; i < n; ++i)
    {
        int ltHei = -1;
        for (auto [hei, node]: nodeOf[i])
        {
            if (ltHei != -1) {
                int u = nodeOf[i][ltHei];
                int v = node;
                nei[u].push_back({v, hei - ltHei});
                nei[v].push_back({u, hei - ltHei});
            }
            ltHei = hei;
        }
    }
    return Dijkstra(n, n + 1);
}

Subtask #1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 144 ms 220932 KB Output is correct
2 Correct 144 ms 221020 KB Output is correct
3 Correct 137 ms 220912 KB Output is correct
4 Incorrect 139 ms 220936 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 142 ms 220936 KB Output is correct
2 Correct 138 ms 220976 KB Output is correct
3 Correct 1330 ms 308196 KB Output is correct
4 Correct 1198 ms 323488 KB Output is correct
5 Correct 787 ms 310332 KB Output is correct
6 Correct 735 ms 299712 KB Output is correct
7 Incorrect 807 ms 310372 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 213 ms 228292 KB Output is correct
2 Incorrect 494 ms 244440 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 213 ms 228292 KB Output is correct
2 Incorrect 494 ms 244440 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# 결과 실행 시간 메모리 Grader output
1 Correct 144 ms 220932 KB Output is correct
2 Correct 144 ms 221020 KB Output is correct
3 Correct 137 ms 220912 KB Output is correct
4 Incorrect 139 ms 220936 KB Output isn't correct
5 Halted 0 ms 0 KB -