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Submission #761425

# Submission time Handle Problem Language Result Execution time Memory
761425 2023-06-19T15:40:21 Z MinaRagy06 Sky Walking (IOI19_walk) C++17
10 / 100
 4000 ms 588960 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

vector<int> intersect[100'005];
vector<array<int, 3>> adj[100'005];
vector<ll> dist[100'005];
vector<int> idx[100'005];
int sparse[17][200'005];
const ll INF = 1e18;
ll min_distance(vector<int> x, vector<int> h, vector<int> l, vector<int> r, vector<int> y, int s, int g) {
    int n = x.size(), m = l.size();
    for (int i = 0; i < n; i++) {
        sparse[0][i] = h[i];
    }
    for (int j = 1; j < 17; j++) {
        for (int i = 0; i < n; i++) {
            sparse[j][i] = max(sparse[j - 1][i], sparse[j - 1][i + (1 << (j - 1))]);
        }
    }
    y.push_back(0);
    idx[s].push_back(m);
    dist[s].push_back(INF);
    for (int i = 0; i < m; i++) {
        int j = l[i];
        while (j <= r[i]) {
            if (y[i] <= h[j]) {
                intersect[i].push_back(j);
                j++;
                continue;
            }
            int mx = 0;
            for (int k = 16; k >= 0; k--) {
                if (y[i] > max(mx, sparse[k][j])) {
                    mx = max(mx, sparse[k][j]);
                    j += (1 << k);
                }
            }
            if (j <= r[i]) {
                intersect[i].push_back(j);
                j++;
            }
        }
        for (int k = 0; k < intersect[i].size(); k++) {
            dist[intersect[i][k]].push_back(INF);
            idx[intersect[i][k]].push_back(i);
        }
        for (int k = 0; k < intersect[i].size(); k++) {
            if (k + 1 < intersect[i].size()) {
                adj[intersect[i][k]].push_back((array<int, 3>) {intersect[i][k + 1], idx[intersect[i][k + 1]].size() - 1, y[i]});
            }
            if (k - 1 >= 0) {
                adj[intersect[i][k]].push_back((array<int, 3>) {intersect[i][k - 1], idx[intersect[i][k - 1]].size() - 1, y[i]});
            }
        }
        // assert(intersect[i].size() <= 10);
    }
    int cnt = 0;
    for (int i = 0; i < n; i++) {
        cnt += idx[i].size();
    }
    assert(cnt <= 2'000'000);
    priority_queue<pair<ll, array<int, 3>>> pq;
    pq.push({0, {s, 0, 0}});
    while (pq.size()) {
        ll d = -pq.top().first;
        int i = pq.top().second[0];
        int j = pq.top().second[1];
        int cury = pq.top().second[2];
        pq.pop();
        if (d > dist[i][j]) continue;
        cnt++;
        for (auto [nxt, nxth, w] : adj[i]) {
            ll newd = d + abs(x[nxt] - x[i]) + abs(cury - w);
            if (newd < dist[nxt][nxth]) {
                dist[nxt][nxth] = newd;
                pq.push({-newd, {nxt, nxth, w}});
            }
        }
    }
    ll ans = INF;
    for (int i = 0; i < dist[g].size(); i++) {
        ans = min(ans, dist[g][i] + y[idx[g][i]]);
    }
    // for (auto i : dist[g]) {
    //     ans = min(ans, i.first + i.second);
    // }
    if (ans >= INF) return -1;
    return ans;
}
// int main() {
//     ios_base::sync_with_stdio(0), cin.tie(0);
//     int N, M;
//     cin >> N >> M;
//     vector<int> X(N), H(N);
//     for (int i = 0; i < N; i++) {
//         cin >> X[i] >> H[i];
//     }
//     vector<int> L(M), R(M), Y(M);
//     for (int i = 0; i < M; i++) {
//         cin >> L[i] >> R[i] >> Y[i];
//     }
//     int S, G;
//     cin >> S >> G;
//     cout << min_distance(X, H, L, R, Y, S, G) << '\n';
//     return 0;
// }

Compilation message

walk.cpp: In function 'll min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:44:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         for (int k = 0; k < intersect[i].size(); k++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~
walk.cpp:48:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         for (int k = 0; k < intersect[i].size(); k++) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~
walk.cpp:49:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |             if (k + 1 < intersect[i].size()) {
      |                 ~~~~~~^~~~~~~~~~~~~~~~~~~~~
walk.cpp:50:118: warning: narrowing conversion of '(idx[intersect[i].std::vector<int>::operator[](((std::vector<int>::size_type)(k + 1)))].std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
   50 |                 adj[intersect[i][k]].push_back((array<int, 3>) {intersect[i][k + 1], idx[intersect[i][k + 1]].size() - 1, y[i]});
      |                                                                                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
walk.cpp:53:118: warning: narrowing conversion of '(idx[intersect[i].std::vector<int>::operator[](((std::vector<int>::size_type)(k - 1)))].std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
   53 |                 adj[intersect[i][k]].push_back((array<int, 3>) {intersect[i][k - 1], idx[intersect[i][k - 1]].size() - 1, y[i]});
      |                                                                                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
walk.cpp:82:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |     for (int i = 0; i < dist[g].size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9704 KB Output is correct
3 Correct 5 ms 9736 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9764 KB Output is correct
6 Correct 5 ms 9812 KB Output is correct
7 Correct 5 ms 9812 KB Output is correct
8 Correct 6 ms 9812 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9812 KB Output is correct
11 Correct 4 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 4 ms 9684 KB Output is correct
15 Correct 4 ms 9684 KB Output is correct
16 Correct 4 ms 9684 KB Output is correct
17 Correct 5 ms 9852 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9684 KB Output is correct
2 Correct 4 ms 9684 KB Output is correct
3 Correct 1559 ms 68824 KB Output is correct
4 Correct 476 ms 61120 KB Output is correct
5 Correct 219 ms 56660 KB Output is correct
6 Correct 198 ms 52116 KB Output is correct
7 Correct 203 ms 56720 KB Output is correct
8 Correct 3196 ms 113244 KB Output is correct
9 Correct 286 ms 54980 KB Output is correct
10 Correct 774 ms 82952 KB Output is correct
11 Correct 221 ms 35012 KB Output is correct
12 Correct 120 ms 32776 KB Output is correct
13 Correct 603 ms 79952 KB Output is correct
14 Correct 172 ms 32948 KB Output is correct
15 Correct 152 ms 32832 KB Output is correct
16 Correct 359 ms 33080 KB Output is correct
17 Correct 170 ms 32252 KB Output is correct
18 Execution timed out 4061 ms 34412 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 17740 KB Output is correct
2 Runtime error 618 ms 588960 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 17740 KB Output is correct
2 Runtime error 618 ms 588960 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 9684 KB Output is correct
2 Correct 5 ms 9704 KB Output is correct
3 Correct 5 ms 9736 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9764 KB Output is correct
6 Correct 5 ms 9812 KB Output is correct
7 Correct 5 ms 9812 KB Output is correct
8 Correct 6 ms 9812 KB Output is correct
9 Correct 5 ms 9688 KB Output is correct
10 Correct 5 ms 9812 KB Output is correct
11 Correct 4 ms 9684 KB Output is correct
12 Correct 4 ms 9684 KB Output is correct
13 Correct 5 ms 9684 KB Output is correct
14 Correct 4 ms 9684 KB Output is correct
15 Correct 4 ms 9684 KB Output is correct
16 Correct 4 ms 9684 KB Output is correct
17 Correct 5 ms 9852 KB Output is correct
18 Correct 5 ms 9684 KB Output is correct
19 Correct 4 ms 9684 KB Output is correct
20 Correct 1559 ms 68824 KB Output is correct
21 Correct 476 ms 61120 KB Output is correct
22 Correct 219 ms 56660 KB Output is correct
23 Correct 198 ms 52116 KB Output is correct
24 Correct 203 ms 56720 KB Output is correct
25 Correct 3196 ms 113244 KB Output is correct
26 Correct 286 ms 54980 KB Output is correct
27 Correct 774 ms 82952 KB Output is correct
28 Correct 221 ms 35012 KB Output is correct
29 Correct 120 ms 32776 KB Output is correct
30 Correct 603 ms 79952 KB Output is correct
31 Correct 172 ms 32948 KB Output is correct
32 Correct 152 ms 32832 KB Output is correct
33 Correct 359 ms 33080 KB Output is correct
34 Correct 170 ms 32252 KB Output is correct
35 Execution timed out 4061 ms 34412 KB Time limit exceeded
36 Halted 0 ms 0 KB -