oj.uz

Submission #1021389

# Submission time Handle Problem Language Result Execution time Memory
1021389 2024-07-12T17:28:04 Z Wael Fountain Parks (IOI21_parks) C++17
15 / 100
 285 ms 37696 KB 
#include "parks.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;

struct DSU {
    int n, cnt;
    vector<int> f, sz;
    DSU(int n) : n(n), cnt(n) {
        f.resize(n);
        iota(f.begin(), f.end(), 0);
        sz.resize(n, 1);
    }

    int find(int u) {
        if (f[u] == u) return u;
        return f[u] = find(f[u]);
    }

    void merge(int u, int v) {
        u = find(u);
        v = find(v);
        if (u == v) return;
        --cnt;
        if (sz[v] > sz[u]) {
            swap(u, v);
        }
        f[v] = u;
        sz[u] += sz[v];
    }

    bool same(int u, int v) {
        return find(u) == find(v);
    }
};

int construct_roads(vector<int> x, vector<int> y) {
    int n = x.size();

    int N = 2e5;
    vector<map<int, int>> id(N + 1);

    for (int i = 0; i < n; ++i) {
        id[x[i]][y[i]] = i;
    }

    DSU dsu(n);
    vector<int> u, v, a, b;
    for (int i = 0; i < n; ++i) {
        if (id[x[i]].count(y[i] + 2)) {
            int j = id[x[i]][y[i] + 2];
            dsu.merge(i, j);
            u.push_back(i);
            v.push_back(j);
            if (x[i] == 4) {
                a.push_back(x[i] + 1);
                b.push_back(y[i] + 1);
            } else {
                a.push_back(x[i] - 1);
                b.push_back(y[i] + 1);
            }
        }

        if (x[i] == 2 && id[x[i] + 2].count(y[i])) {
            int j = id[x[i] + 2][y[i]];
            if (dsu.same(i, j) == 0) {
                dsu.merge(i, j);
                u.push_back(i);
                v.push_back(j);
                a.push_back(x[i] + 1);
                b.push_back(y[i] + 1);
            } 
        }
    }

    if (dsu.cnt == 1) {
        build(u, v, a, b);
        return 1;
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 4 ms 9820 KB Output is correct
4 Correct 6 ms 9816 KB Output is correct
5 Correct 5 ms 9820 KB Output is correct
6 Correct 4 ms 9824 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 100 ms 21568 KB Output is correct
10 Correct 10 ms 11096 KB Output is correct
11 Correct 37 ms 16336 KB Output is correct
12 Correct 12 ms 11608 KB Output is correct
13 Correct 22 ms 13792 KB Output is correct
14 Correct 6 ms 9820 KB Output is correct
15 Correct 6 ms 9820 KB Output is correct
16 Correct 95 ms 21676 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 4 ms 9820 KB Output is correct
4 Correct 6 ms 9816 KB Output is correct
5 Correct 5 ms 9820 KB Output is correct
6 Correct 4 ms 9824 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 100 ms 21568 KB Output is correct
10 Correct 10 ms 11096 KB Output is correct
11 Correct 37 ms 16336 KB Output is correct
12 Correct 12 ms 11608 KB Output is correct
13 Correct 22 ms 13792 KB Output is correct
14 Correct 6 ms 9820 KB Output is correct
15 Correct 6 ms 9820 KB Output is correct
16 Correct 95 ms 21676 KB Output is correct
17 Correct 6 ms 9816 KB Output is correct
18 Correct 5 ms 9820 KB Output is correct
19 Correct 4 ms 9820 KB Output is correct
20 Correct 5 ms 9820 KB Output is correct
21 Correct 4 ms 9820 KB Output is correct
22 Correct 5 ms 9820 KB Output is correct
23 Correct 270 ms 37460 KB Output is correct
24 Correct 4 ms 9820 KB Output is correct
25 Correct 5 ms 9820 KB Output is correct
26 Correct 8 ms 9960 KB Output is correct
27 Correct 6 ms 10228 KB Output is correct
28 Correct 93 ms 20916 KB Output is correct
29 Correct 158 ms 26532 KB Output is correct
30 Correct 202 ms 31928 KB Output is correct
31 Correct 285 ms 37696 KB Output is correct
32 Correct 5 ms 9820 KB Output is correct
33 Correct 4 ms 9728 KB Output is correct
34 Correct 4 ms 9820 KB Output is correct
35 Correct 4 ms 9820 KB Output is correct
36 Correct 4 ms 9792 KB Output is correct
37 Correct 4 ms 9820 KB Output is correct
38 Correct 4 ms 9652 KB Output is correct
39 Correct 4 ms 9820 KB Output is correct
40 Correct 5 ms 9820 KB Output is correct
41 Correct 5 ms 9816 KB Output is correct
42 Correct 4 ms 9820 KB Output is correct
43 Correct 5 ms 9820 KB Output is correct
44 Correct 6 ms 10076 KB Output is correct
45 Correct 105 ms 22324 KB Output is correct
46 Correct 170 ms 28072 KB Output is correct
47 Correct 166 ms 27984 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 4 ms 9820 KB Output is correct
4 Correct 6 ms 9816 KB Output is correct
5 Correct 5 ms 9820 KB Output is correct
6 Correct 4 ms 9824 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 100 ms 21568 KB Output is correct
10 Correct 10 ms 11096 KB Output is correct
11 Correct 37 ms 16336 KB Output is correct
12 Correct 12 ms 11608 KB Output is correct
13 Correct 22 ms 13792 KB Output is correct
14 Correct 6 ms 9820 KB Output is correct
15 Correct 6 ms 9820 KB Output is correct
16 Correct 95 ms 21676 KB Output is correct
17 Correct 6 ms 9816 KB Output is correct
18 Correct 5 ms 9820 KB Output is correct
19 Correct 4 ms 9820 KB Output is correct
20 Correct 5 ms 9820 KB Output is correct
21 Correct 4 ms 9820 KB Output is correct
22 Correct 5 ms 9820 KB Output is correct
23 Correct 270 ms 37460 KB Output is correct
24 Correct 4 ms 9820 KB Output is correct
25 Correct 5 ms 9820 KB Output is correct
26 Correct 8 ms 9960 KB Output is correct
27 Correct 6 ms 10228 KB Output is correct
28 Correct 93 ms 20916 KB Output is correct
29 Correct 158 ms 26532 KB Output is correct
30 Correct 202 ms 31928 KB Output is correct
31 Correct 285 ms 37696 KB Output is correct
32 Correct 5 ms 9820 KB Output is correct
33 Correct 4 ms 9728 KB Output is correct
34 Correct 4 ms 9820 KB Output is correct
35 Correct 4 ms 9820 KB Output is correct
36 Correct 4 ms 9792 KB Output is correct
37 Correct 4 ms 9820 KB Output is correct
38 Correct 4 ms 9652 KB Output is correct
39 Correct 4 ms 9820 KB Output is correct
40 Correct 5 ms 9820 KB Output is correct
41 Correct 5 ms 9816 KB Output is correct
42 Correct 4 ms 9820 KB Output is correct
43 Correct 5 ms 9820 KB Output is correct
44 Correct 6 ms 10076 KB Output is correct
45 Correct 105 ms 22324 KB Output is correct
46 Correct 170 ms 28072 KB Output is correct
47 Correct 166 ms 27984 KB Output is correct
48 Incorrect 5 ms 9816 KB Solution announced impossible, but it is possible.
49 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 4 ms 9820 KB Output is correct
4 Correct 6 ms 9816 KB Output is correct
5 Correct 5 ms 9820 KB Output is correct
6 Correct 4 ms 9824 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 100 ms 21568 KB Output is correct
10 Correct 10 ms 11096 KB Output is correct
11 Correct 37 ms 16336 KB Output is correct
12 Correct 12 ms 11608 KB Output is correct
13 Correct 22 ms 13792 KB Output is correct
14 Correct 6 ms 9820 KB Output is correct
15 Correct 6 ms 9820 KB Output is correct
16 Correct 95 ms 21676 KB Output is correct
17 Incorrect 4 ms 9820 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 4 ms 9820 KB Output is correct
4 Correct 6 ms 9816 KB Output is correct
5 Correct 5 ms 9820 KB Output is correct
6 Correct 4 ms 9824 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 100 ms 21568 KB Output is correct
10 Correct 10 ms 11096 KB Output is correct
11 Correct 37 ms 16336 KB Output is correct
12 Correct 12 ms 11608 KB Output is correct
13 Correct 22 ms 13792 KB Output is correct
14 Correct 6 ms 9820 KB Output is correct
15 Correct 6 ms 9820 KB Output is correct
16 Correct 95 ms 21676 KB Output is correct
17 Incorrect 148 ms 25400 KB Solution announced impossible, but it is possible.
18 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9816 KB Output is correct
2 Correct 4 ms 9820 KB Output is correct
3 Correct 4 ms 9820 KB Output is correct
4 Correct 6 ms 9816 KB Output is correct
5 Correct 5 ms 9820 KB Output is correct
6 Correct 4 ms 9824 KB Output is correct
7 Correct 4 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 100 ms 21568 KB Output is correct
10 Correct 10 ms 11096 KB Output is correct
11 Correct 37 ms 16336 KB Output is correct
12 Correct 12 ms 11608 KB Output is correct
13 Correct 22 ms 13792 KB Output is correct
14 Correct 6 ms 9820 KB Output is correct
15 Correct 6 ms 9820 KB Output is correct
16 Correct 95 ms 21676 KB Output is correct
17 Correct 6 ms 9816 KB Output is correct
18 Correct 5 ms 9820 KB Output is correct
19 Correct 4 ms 9820 KB Output is correct
20 Correct 5 ms 9820 KB Output is correct
21 Correct 4 ms 9820 KB Output is correct
22 Correct 5 ms 9820 KB Output is correct
23 Correct 270 ms 37460 KB Output is correct
24 Correct 4 ms 9820 KB Output is correct
25 Correct 5 ms 9820 KB Output is correct
26 Correct 8 ms 9960 KB Output is correct
27 Correct 6 ms 10228 KB Output is correct
28 Correct 93 ms 20916 KB Output is correct
29 Correct 158 ms 26532 KB Output is correct
30 Correct 202 ms 31928 KB Output is correct
31 Correct 285 ms 37696 KB Output is correct
32 Correct 5 ms 9820 KB Output is correct
33 Correct 4 ms 9728 KB Output is correct
34 Correct 4 ms 9820 KB Output is correct
35 Correct 4 ms 9820 KB Output is correct
36 Correct 4 ms 9792 KB Output is correct
37 Correct 4 ms 9820 KB Output is correct
38 Correct 4 ms 9652 KB Output is correct
39 Correct 4 ms 9820 KB Output is correct
40 Correct 5 ms 9820 KB Output is correct
41 Correct 5 ms 9816 KB Output is correct
42 Correct 4 ms 9820 KB Output is correct
43 Correct 5 ms 9820 KB Output is correct
44 Correct 6 ms 10076 KB Output is correct
45 Correct 105 ms 22324 KB Output is correct
46 Correct 170 ms 28072 KB Output is correct
47 Correct 166 ms 27984 KB Output is correct
48 Incorrect 5 ms 9816 KB Solution announced impossible, but it is possible.
49 Halted 0 ms 0 KB -