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Submission #349533

# Submission time Handle Problem Language Result Execution time Memory
349533 2021-01-17T18:47:18 Z izhang05 Connecting Supertrees (IOI20_supertrees) C++17
40 / 100
 268 ms 25312 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;
const int maxn = 1e3 + 5;
int parent[maxn];
vector<int> comp[maxn];

int get(int x) {
    return parent[x] == x ? x : parent[x] = get(parent[x]);
}

bool merge(int x, int y) {
    int xroot = get(x), yroot = get(y);
    if (comp[xroot].size() < comp[yroot].size()) {
        swap(xroot, yroot);
    }
    if (xroot != yroot) {
        parent[xroot] = yroot;
        comp[yroot].insert(comp[yroot].end(), comp[xroot].begin(), comp[xroot].end());
        comp[xroot].clear();
        return true;
    }
    return false;
}

bool same(int x, int y) {
    return get(x) == get(y);
}

int construct(vector<vector<int>> p) {
    int n = p.size();
    for (int i = 0; i < n; ++i) {
        parent[i] = i;
        comp[i].push_back(i);
        if (p[i][i] != 1) {
            return 0;
        }
    }
    vector<vector<int>> sol(n, vector<int>(n));
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (p[i][j]) {
                merge(i, j);
            }
        }
    }
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (!p[i][j] && same(i, j)) {
                return 0;
            }
        }
    }

    for (int i = 0; i < n; i++) {
        if (comp[i].size() > 1) {
            for (int j = 0; j < (int) comp[i].size() - 1; ++j) {
                sol[comp[i][j]][comp[i][j + 1]] = 1;
                sol[comp[i][j + 1]][comp[i][j]] = 1;
            }
            if (p[comp[i][0]][comp[i][1]] == 2) {
                if (comp[i].size() == 2) {
                    return 0;
                }
                sol[comp[i][0]][comp[i][comp[i].size() - 1]] = 1;
                sol[comp[i][comp[i].size() - 1]][comp[i][0]] = 1;
            }
        }
    }
    build(sol);
    return 1;
}

#ifdef DEBUG
int main() {
    freopen("1.in", "r", stdin);
    int n;
    cin >> n;
    vector<vector<int>> a(n, vector<int>(n));
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            cin >> a[i][j];
        }
    }
    cout << construct(a) << "\n";
}
#endif

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 10 ms 1260 KB Output is correct
7 Correct 241 ms 24172 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 10 ms 1260 KB Output is correct
7 Correct 241 ms 24172 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 10 ms 1260 KB Output is correct
13 Correct 246 ms 22124 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 876 KB Output is correct
17 Correct 110 ms 14188 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 62 ms 5868 KB Output is correct
21 Correct 259 ms 22508 KB Output is correct
22 Correct 247 ms 22252 KB Output is correct
23 Correct 253 ms 23420 KB Output is correct
24 Correct 247 ms 22380 KB Output is correct
25 Correct 104 ms 12396 KB Output is correct
26 Correct 102 ms 12396 KB Output is correct
27 Correct 255 ms 23148 KB Output is correct
28 Correct 244 ms 22124 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 11 ms 1260 KB Output is correct
9 Correct 251 ms 23276 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 10 ms 1388 KB Output is correct
13 Correct 257 ms 25312 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 1004 KB Output is correct
17 Correct 108 ms 15340 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 63 ms 6380 KB Output is correct
22 Correct 247 ms 23532 KB Output is correct
23 Correct 253 ms 23404 KB Output is correct
24 Correct 254 ms 24300 KB Output is correct
25 Correct 101 ms 13292 KB Output is correct
26 Correct 104 ms 13548 KB Output is correct
27 Correct 268 ms 23404 KB Output is correct
28 Correct 258 ms 24404 KB Output is correct
29 Correct 105 ms 13292 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 62 ms 5868 KB Output is correct
5 Correct 250 ms 22380 KB Output is correct
6 Correct 246 ms 22124 KB Output is correct
7 Correct 255 ms 23148 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 63 ms 5868 KB Output is correct
10 Correct 254 ms 22380 KB Output is correct
11 Correct 262 ms 22252 KB Output is correct
12 Correct 256 ms 23148 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Incorrect 0 ms 364 KB Too many ways to get from 0 to 4, should be 1 found no less than 2
16 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 10 ms 1260 KB Output is correct
7 Correct 241 ms 24172 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 10 ms 1260 KB Output is correct
13 Correct 246 ms 22124 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 876 KB Output is correct
17 Correct 110 ms 14188 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 62 ms 5868 KB Output is correct
21 Correct 259 ms 22508 KB Output is correct
22 Correct 247 ms 22252 KB Output is correct
23 Correct 253 ms 23420 KB Output is correct
24 Correct 247 ms 22380 KB Output is correct
25 Correct 104 ms 12396 KB Output is correct
26 Correct 102 ms 12396 KB Output is correct
27 Correct 255 ms 23148 KB Output is correct
28 Correct 244 ms 22124 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 0 ms 364 KB Output is correct
31 Correct 0 ms 364 KB Output is correct
32 Correct 0 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 364 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 11 ms 1260 KB Output is correct
37 Correct 251 ms 23276 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 1 ms 364 KB Output is correct
40 Correct 10 ms 1388 KB Output is correct
41 Correct 257 ms 25312 KB Output is correct
42 Correct 1 ms 364 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 5 ms 1004 KB Output is correct
45 Correct 108 ms 15340 KB Output is correct
46 Correct 1 ms 364 KB Output is correct
47 Correct 1 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 63 ms 6380 KB Output is correct
50 Correct 247 ms 23532 KB Output is correct
51 Correct 253 ms 23404 KB Output is correct
52 Correct 254 ms 24300 KB Output is correct
53 Correct 101 ms 13292 KB Output is correct
54 Correct 104 ms 13548 KB Output is correct
55 Correct 268 ms 23404 KB Output is correct
56 Correct 258 ms 24404 KB Output is correct
57 Correct 105 ms 13292 KB Output is correct
58 Correct 1 ms 364 KB Output is correct
59 Correct 1 ms 364 KB Output is correct
60 Correct 5 ms 1004 KB Output is correct
61 Correct 106 ms 15340 KB Output is correct
62 Correct 1 ms 364 KB Output is correct
63 Correct 1 ms 364 KB Output is correct
64 Correct 1 ms 364 KB Output is correct
65 Incorrect 63 ms 6380 KB Too many ways to get from 7 to 50, should be 1 found no less than 2
66 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 10 ms 1260 KB Output is correct
7 Correct 241 ms 24172 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 0 ms 364 KB Output is correct
12 Correct 10 ms 1260 KB Output is correct
13 Correct 246 ms 22124 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 5 ms 876 KB Output is correct
17 Correct 110 ms 14188 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 62 ms 5868 KB Output is correct
21 Correct 259 ms 22508 KB Output is correct
22 Correct 247 ms 22252 KB Output is correct
23 Correct 253 ms 23420 KB Output is correct
24 Correct 247 ms 22380 KB Output is correct
25 Correct 104 ms 12396 KB Output is correct
26 Correct 102 ms 12396 KB Output is correct
27 Correct 255 ms 23148 KB Output is correct
28 Correct 244 ms 22124 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 0 ms 364 KB Output is correct
31 Correct 0 ms 364 KB Output is correct
32 Correct 0 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 364 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 11 ms 1260 KB Output is correct
37 Correct 251 ms 23276 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 1 ms 364 KB Output is correct
40 Correct 10 ms 1388 KB Output is correct
41 Correct 257 ms 25312 KB Output is correct
42 Correct 1 ms 364 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 5 ms 1004 KB Output is correct
45 Correct 108 ms 15340 KB Output is correct
46 Correct 1 ms 364 KB Output is correct
47 Correct 1 ms 364 KB Output is correct
48 Correct 1 ms 364 KB Output is correct
49 Correct 63 ms 6380 KB Output is correct
50 Correct 247 ms 23532 KB Output is correct
51 Correct 253 ms 23404 KB Output is correct
52 Correct 254 ms 24300 KB Output is correct
53 Correct 101 ms 13292 KB Output is correct
54 Correct 104 ms 13548 KB Output is correct
55 Correct 268 ms 23404 KB Output is correct
56 Correct 258 ms 24404 KB Output is correct
57 Correct 105 ms 13292 KB Output is correct
58 Correct 0 ms 364 KB Output is correct
59 Correct 0 ms 364 KB Output is correct
60 Correct 1 ms 364 KB Output is correct
61 Correct 62 ms 5868 KB Output is correct
62 Correct 250 ms 22380 KB Output is correct
63 Correct 246 ms 22124 KB Output is correct
64 Correct 255 ms 23148 KB Output is correct
65 Correct 1 ms 364 KB Output is correct
66 Correct 63 ms 5868 KB Output is correct
67 Correct 254 ms 22380 KB Output is correct
68 Correct 262 ms 22252 KB Output is correct
69 Correct 256 ms 23148 KB Output is correct
70 Correct 1 ms 364 KB Output is correct
71 Correct 1 ms 364 KB Output is correct
72 Incorrect 0 ms 364 KB Too many ways to get from 0 to 4, should be 1 found no less than 2
73 Halted 0 ms 0 KB -