oj.uz

Submission #472900

# Submission time Handle Problem Language Result Execution time Memory
472900 2021-09-14T13:19:40 Z dxz05 Sky Walking (IOI19_walk) C++14
10 / 100
 4000 ms 1048576 KB 
#include "walk.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#define MP make_pair

const int MAXN = 2e6 + 3e2;

void sort(vector<int> &l, vector<int> &r, vector<int> &y){
    vector<pair<int, pair<int, int>>> vec(y.size());
    for (int i = 0; i < y.size(); i++){
        vec[i] = MP(y[i], MP(l[i], r[i]));
    }
    sort(vec.begin(), vec.end());

    for (int i = 0; i < y.size(); i++){
        y[i] = vec[i].first;
        l[i] = vec[i].second.first;
        r[i] = vec[i].second.second;
    }
}

map<int, int> mp[MAXN];
int next_id = 0;
vector<pair<int, int>> points[MAXN];

int id(int i, int h){
    if (mp[i].find(h) != mp[i].end()) return mp[i][h];
    return mp[i][h] = next_id++;
}

vector<pair<int, int>> g[MAXN];

long long min_distance(vector<int> x, vector<int> h, vector<int> l, vector<int> r, vector<int> y, int start, int finish) {
    int n = x.size(), m = y.size();
    sort(l, r, y);

    for (int i = 0; i < n; i++){
        points[i].emplace_back(id(i, 0), 0);
    }

    for (int i = 0; i < m; i++){
        //cout << l[i] << ' ' << r[i] << ' ' << y[i] << endl;
        int last = l[i];
        for (int j = l[i]; j <= r[i]; j++){
            if (y[i] > h[j]) continue;
            int a = id(j, y[i]);
            points[j].emplace_back(a, y[i]);

            if (j > l[i]) {
                int b = id(last, y[i]);
                g[a].emplace_back(b, x[j] - x[last]);
                g[b].emplace_back(a, x[j] - x[last]);
            }

            last = j;
        }
    }

    for (int i = 0; i < n; i++){
        if (points[i].back().second != h[i]) points[i].emplace_back(id(i, h[i]), h[i]);
//        cout << i << endl;
        for (int j = 1; j < points[i].size(); j++){
//            cout << points[i][j].first << ' ' << points[i][j].second << endl;
            int a = points[i][j - 1].first, b = points[i][j].first, w = points[i][j].second - points[i][j - 1].second;
            assert(w >= 0);
            g[a].emplace_back(b, w);
            g[b].emplace_back(a, w);
        }
    }

    int k = next_id;
    vector<ll> d(k, 1e18);
    vector<bool> processed(k, false);
    d[start] = 0;

    priority_queue<pair<ll, int>> pq;
    pq.push(MP(0, start));

    while (!pq.empty()){
        int v = pq.top().second; pq.pop();
        if (processed[v]) continue;
        processed[v] = true;

        for (auto e : g[v]){
            int u = e.first, w = e.second;
            if (d[u] > d[v] + w){
                d[u] = d[v] + w;
                pq.push(MP(-d[u], u));
            }
        }

    }

    if (!processed[finish]) return -1;

	return d[finish];
}

Compilation message

walk.cpp: In function 'void sort(std::vector<int>&, std::vector<int>&, std::vector<int>&)':
walk.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for (int i = 0; i < y.size(); i++){
      |                     ~~^~~~~~~~~~
walk.cpp:19:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i = 0; i < y.size(); i++){
      |                     ~~^~~~~~~~~~
walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |         for (int j = 1; j < points[i].size(); j++){
      |                         ~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 188100 KB Output is correct
2 Correct 100 ms 188156 KB Output is correct
3 Correct 101 ms 188100 KB Output is correct
4 Correct 101 ms 188100 KB Output is correct
5 Correct 104 ms 188204 KB Output is correct
6 Correct 108 ms 188240 KB Output is correct
7 Correct 101 ms 188228 KB Output is correct
8 Correct 104 ms 188168 KB Output is correct
9 Correct 102 ms 188108 KB Output is correct
10 Correct 100 ms 188236 KB Output is correct
11 Correct 104 ms 188276 KB Output is correct
12 Correct 102 ms 188156 KB Output is correct
13 Correct 103 ms 188100 KB Output is correct
14 Correct 103 ms 188120 KB Output is correct
15 Correct 101 ms 188136 KB Output is correct
16 Correct 105 ms 188132 KB Output is correct
17 Correct 105 ms 188280 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 188072 KB Output is correct
2 Correct 103 ms 188112 KB Output is correct
3 Correct 1165 ms 289200 KB Output is correct
4 Correct 996 ms 304816 KB Output is correct
5 Correct 669 ms 289792 KB Output is correct
6 Correct 1311 ms 278476 KB Output is correct
7 Correct 655 ms 289868 KB Output is correct
8 Correct 1459 ms 319504 KB Output is correct
9 Correct 789 ms 290416 KB Output is correct
10 Correct 1307 ms 350516 KB Output is correct
11 Correct 607 ms 247340 KB Output is correct
12 Correct 432 ms 238516 KB Output is correct
13 Correct 1132 ms 331180 KB Output is correct
14 Correct 3790 ms 232244 KB Output is correct
15 Correct 2004 ms 227552 KB Output is correct
16 Correct 357 ms 228432 KB Output is correct
17 Correct 347 ms 226904 KB Output is correct
18 Execution timed out 4074 ms 207316 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 158 ms 200684 KB Output is correct
2 Execution timed out 4131 ms 1048576 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 158 ms 200684 KB Output is correct
2 Execution timed out 4131 ms 1048576 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 188100 KB Output is correct
2 Correct 100 ms 188156 KB Output is correct
3 Correct 101 ms 188100 KB Output is correct
4 Correct 101 ms 188100 KB Output is correct
5 Correct 104 ms 188204 KB Output is correct
6 Correct 108 ms 188240 KB Output is correct
7 Correct 101 ms 188228 KB Output is correct
8 Correct 104 ms 188168 KB Output is correct
9 Correct 102 ms 188108 KB Output is correct
10 Correct 100 ms 188236 KB Output is correct
11 Correct 104 ms 188276 KB Output is correct
12 Correct 102 ms 188156 KB Output is correct
13 Correct 103 ms 188100 KB Output is correct
14 Correct 103 ms 188120 KB Output is correct
15 Correct 101 ms 188136 KB Output is correct
16 Correct 105 ms 188132 KB Output is correct
17 Correct 105 ms 188280 KB Output is correct
18 Correct 103 ms 188072 KB Output is correct
19 Correct 103 ms 188112 KB Output is correct
20 Correct 1165 ms 289200 KB Output is correct
21 Correct 996 ms 304816 KB Output is correct
22 Correct 669 ms 289792 KB Output is correct
23 Correct 1311 ms 278476 KB Output is correct
24 Correct 655 ms 289868 KB Output is correct
25 Correct 1459 ms 319504 KB Output is correct
26 Correct 789 ms 290416 KB Output is correct
27 Correct 1307 ms 350516 KB Output is correct
28 Correct 607 ms 247340 KB Output is correct
29 Correct 432 ms 238516 KB Output is correct
30 Correct 1132 ms 331180 KB Output is correct
31 Correct 3790 ms 232244 KB Output is correct
32 Correct 2004 ms 227552 KB Output is correct
33 Correct 357 ms 228432 KB Output is correct
34 Correct 347 ms 226904 KB Output is correct
35 Execution timed out 4074 ms 207316 KB Time limit exceeded
36 Halted 0 ms 0 KB -