oj.uz

Submission #443466

# Submission time Handle Problem Language Result Execution time Memory
443466 2021-07-10T14:48:49 Z mjhmjh1104 Fountain Parks (IOI21_parks) C++17
5 / 100
 775 ms 40560 KB 
#include "parks.h"
#include <map>
#include <set>
#include <cstdio>
#include <vector>
#include <utility>
#include <algorithm>
using namespace std;

int uf[200006];

int _find(int x) {
    if (uf[x] == -1) return x;
    return uf[x] = _find(uf[x]);
}

void _merge(int x, int y) {
    x = _find(x), y = _find(y);
    if (x != y) uf[x] = y;
}

map<pair<int, int>, int> m;
set<pair<int, int>> s;

int construct_roads(vector<int> x, vector<int> y) {
    if ((int)x.size() == 1) return build({}, {}, {}, {}), 1;
    int n = (int)x.size();
    for (int i = 0; i < n; i++) uf[i] = -1;
    vector<int> u, v, a, b;
    vector<pair<int, int>> edges, n_edges;
    vector<int> points;
    for (int i = 0; i < n; i++) m[{ x[i], y[i] }] = i;
    for (int i = 0; i < n; i++) if (m.count({ x[i], y[i] - 2 })) {
        edges.push_back({ m[{ x[i], y[i] - 2 }], i });
        _merge(edges.back().first, edges.back().second);
    }
    for (int i = 0; i < n; i++) if (!m.count({ x[i], y[i] - 2 }) || !m.count({ x[i], y[i] + 2 })) points.push_back(i);
    sort(points.begin(), points.end(), [&](const int &a, const int &b) {
        if (y[a] != y[b]) return y[a] < y[b];
        return x[a] < x[b];
    });
    for (int t = 0; t < (int)points.size(); t++) {
        int i = points[t];
        if (m.count({ x[i] - 2, y[i] })) {
            int t = m[{ x[i] - 2, y[i] }];
            if (_find(t) != _find(i)) {
                edges.push_back({ t, i });
                _merge(t, i);
            }
        }
    }
    for (int i = 1; i < n; i++) if (_find(0) != _find(i)) return 0;
    //int min_x = *min_element(x.begin(), x.end()), max_x = *max_element(x.begin(), x.end());
    for (auto &i: edges) {
        /*if (x[i.first] == x[i.second]) {
            u.push_back(i.first);
            v.push_back(i.second);
            a.push_back(x[i.first] - 1);
            b.push_back((y[i.first] + y[i.second]) / 2);
            s.insert({ a.back(), b.back() });
        } else*/ n_edges.push_back(i);
    }
    sort(n_edges.begin(), n_edges.end(), [&](const pair<int, int> &a, const pair<int, int> &b) {
        if (min(x[a.first], x[a.second]) != min(x[b.first], x[b.second])) return min(x[a.first], x[a.second]) < min(x[b.first], x[b.second]);
        if ((x[a.first] == x[a.second]) != (x[b.first] == x[b.second])) return x[a.first] == x[a.second];
        return min(y[a.first], y[a.second]) < min(y[b.first], y[b.second]);
    });
    for (auto &i: n_edges) {
        if (x[i.first] == x[i.second]) {
            if (!s.count({ x[i.first] - 1, (y[i.first] + y[i.second]) / 2 })) {
                s.insert({ x[i.first] - 1, (y[i.first] + y[i.second]) / 2 });
                u.push_back(i.first);
                v.push_back(i.second);
                a.push_back(x[i.first] - 1);
                b.push_back((y[i.first] + y[i.second]) / 2);
            } else {
                if (s.count({ x[i.first] + 1, (y[i.first] + y[i.second]) / 2 })) return 0;
                s.insert({ x[i.first] + 1, (y[i.first] + y[i.second]) / 2 });
                u.push_back(i.first);
                v.push_back(i.second);
                a.push_back(x[i.first] + 1);
                b.push_back((y[i.first] + y[i.second]) / 2);
            }
        } else {
            if (!s.count({ (x[i.first] + x[i.second]) / 2, y[i.first] - 1 })) {
                s.insert({ (x[i.first] + x[i.second]) / 2, y[i.first] - 1 });
                u.push_back(i.first);
                v.push_back(i.second);
                a.push_back((x[i.first] + x[i.second]) / 2);
                b.push_back(y[i.first] - 1);
            } else {
                if (s.count({ (x[i.first] + x[i.second]) / 2, y[i.first] + 1 })) return 0;
                s.insert({ (x[i.first] + x[i.second]) / 2, y[i.first] + 1 });
                u.push_back(i.first);
                v.push_back(i.second);
                a.push_back((x[i.first] + x[i.second]) / 2);
                b.push_back(y[i.first] + 1);
            }
        }
    }
    build(u, v, a, b);
    return 1;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 286 ms 19492 KB Output is correct
10 Correct 14 ms 2472 KB Output is correct
11 Correct 87 ms 11284 KB Output is correct
12 Correct 23 ms 3640 KB Output is correct
13 Correct 39 ms 4780 KB Output is correct
14 Correct 1 ms 368 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 273 ms 19528 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 286 ms 19492 KB Output is correct
10 Correct 14 ms 2472 KB Output is correct
11 Correct 87 ms 11284 KB Output is correct
12 Correct 23 ms 3640 KB Output is correct
13 Correct 39 ms 4780 KB Output is correct
14 Correct 1 ms 368 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 273 ms 19528 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 679 ms 38808 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 3 ms 588 KB Output is correct
27 Correct 4 ms 588 KB Output is correct
28 Correct 199 ms 15756 KB Output is correct
29 Correct 453 ms 23360 KB Output is correct
30 Correct 612 ms 31312 KB Output is correct
31 Correct 705 ms 38852 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 0 ms 204 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 4 ms 460 KB Output is correct
45 Incorrect 188 ms 9816 KB Solution announced impossible, but it is possible.
46 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 286 ms 19492 KB Output is correct
10 Correct 14 ms 2472 KB Output is correct
11 Correct 87 ms 11284 KB Output is correct
12 Correct 23 ms 3640 KB Output is correct
13 Correct 39 ms 4780 KB Output is correct
14 Correct 1 ms 368 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 273 ms 19528 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 679 ms 38808 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 3 ms 588 KB Output is correct
27 Correct 4 ms 588 KB Output is correct
28 Correct 199 ms 15756 KB Output is correct
29 Correct 453 ms 23360 KB Output is correct
30 Correct 612 ms 31312 KB Output is correct
31 Correct 705 ms 38852 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 0 ms 204 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 4 ms 460 KB Output is correct
45 Incorrect 188 ms 9816 KB Solution announced impossible, but it is possible.
46 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 286 ms 19492 KB Output is correct
10 Correct 14 ms 2472 KB Output is correct
11 Correct 87 ms 11284 KB Output is correct
12 Correct 23 ms 3640 KB Output is correct
13 Correct 39 ms 4780 KB Output is correct
14 Correct 1 ms 368 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 273 ms 19528 KB Output is correct
17 Correct 0 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 775 ms 39664 KB Output is correct
21 Correct 766 ms 40560 KB Output is correct
22 Correct 702 ms 39608 KB Output is correct
23 Correct 576 ms 34204 KB Output is correct
24 Correct 481 ms 17860 KB Output is correct
25 Correct 531 ms 19652 KB Output is correct
26 Correct 552 ms 18892 KB Output is correct
27 Correct 681 ms 38976 KB Output is correct
28 Correct 692 ms 38816 KB Output is correct
29 Correct 719 ms 39624 KB Output is correct
30 Incorrect 532 ms 19652 KB Solution announced impossible, but it is possible.
31 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 286 ms 19492 KB Output is correct
10 Correct 14 ms 2472 KB Output is correct
11 Correct 87 ms 11284 KB Output is correct
12 Correct 23 ms 3640 KB Output is correct
13 Correct 39 ms 4780 KB Output is correct
14 Correct 1 ms 368 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 273 ms 19528 KB Output is correct
17 Correct 687 ms 39916 KB Output is correct
18 Correct 690 ms 39772 KB Output is correct
19 Incorrect 549 ms 19616 KB Solution announced impossible, but it is possible.
20 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 286 ms 19492 KB Output is correct
10 Correct 14 ms 2472 KB Output is correct
11 Correct 87 ms 11284 KB Output is correct
12 Correct 23 ms 3640 KB Output is correct
13 Correct 39 ms 4780 KB Output is correct
14 Correct 1 ms 368 KB Output is correct
15 Correct 2 ms 460 KB Output is correct
16 Correct 273 ms 19528 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 679 ms 38808 KB Output is correct
24 Correct 0 ms 204 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 3 ms 588 KB Output is correct
27 Correct 4 ms 588 KB Output is correct
28 Correct 199 ms 15756 KB Output is correct
29 Correct 453 ms 23360 KB Output is correct
30 Correct 612 ms 31312 KB Output is correct
31 Correct 705 ms 38852 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 0 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 0 ms 204 KB Output is correct
37 Correct 0 ms 204 KB Output is correct
38 Correct 0 ms 204 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 0 ms 204 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 4 ms 460 KB Output is correct
45 Incorrect 188 ms 9816 KB Solution announced impossible, but it is possible.
46 Halted 0 ms 0 KB -