oj.uz

Submission #349559

# Submission time Handle Problem Language Result Execution time Memory
349559 2021-01-17T19:40:14 Z izhang05 Connecting Supertrees (IOI20_supertrees) C++17
40 / 100
 263 ms 25964 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;
const int maxn = 1e3 + 5;
int parent[maxn], parent2[maxn];
vector<int> comp[maxn], comp2[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 get2(int x) {
    return parent2[x] == x ? x : parent2[x] = get2(parent2[x]);
}

bool merge2(int x, int y) {
    int xroot = get2(x), yroot = get2(y);
    if (comp2[xroot].size() < comp2[yroot].size()) {
        swap(xroot, yroot);
    }
    if (xroot != yroot) {
        parent2[xroot] = yroot;
        comp2[yroot].insert(comp2[yroot].end(), comp2[xroot].begin(), comp2[xroot].end());
        comp2[xroot].clear();
        return true;
    }
    return false;
}

bool same2(int x, int y) {
    return get2(x) == get2(y);
}

int construct(vector<vector<int>> p) {
    int n = p.size();
    for (int i = 0; i < n; ++i) {
        parent[i] = i;
        parent2[i] = i;
        comp[i].push_back(i);
        comp2[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] == 1) {
                merge(i, j);
            } else if (p[i][j] == 2) {
                merge2(i, j);
            }
        }
    }
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (!p[i][j] && (same(i, j) || same2(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 (comp2[i].size() > 1) {
            for (int j = 0; j < (int) comp2[i].size() - 1; ++j) {
                sol[comp2[i][j]][comp2[i][j + 1]] = 1;
                sol[comp2[i][j + 1]][comp2[i][j]] = 1;
            }
            if (comp2[i].size() == 2) {
                return 0;
            }
            sol[comp2[i][0]][comp2[i][comp2[i].size() - 1]] = 1;
            sol[comp2[i][comp2[i].size() - 1]][comp2[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 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 10 ms 1388 KB Output is correct
7 Correct 242 ms 24212 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 10 ms 1388 KB Output is correct
7 Correct 242 ms 24212 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 384 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 1260 KB Output is correct
13 Correct 245 ms 22252 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 110 ms 14316 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 64 ms 5868 KB Output is correct
21 Correct 251 ms 22508 KB Output is correct
22 Correct 253 ms 22252 KB Output is correct
23 Correct 260 ms 23188 KB Output is correct
24 Correct 252 ms 22252 KB Output is correct
25 Correct 103 ms 12524 KB Output is correct
26 Correct 100 ms 12268 KB Output is correct
27 Correct 259 ms 23188 KB Output is correct
28 Correct 248 ms 22252 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 1 ms 364 KB Output is correct
3 Correct 1 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 1388 KB Output is correct
9 Correct 249 ms 23916 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 242 ms 25964 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 109 ms 15980 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 64 ms 6380 KB Output is correct
22 Correct 258 ms 24172 KB Output is correct
23 Correct 249 ms 24044 KB Output is correct
24 Correct 263 ms 24940 KB Output is correct
25 Correct 104 ms 14096 KB Output is correct
26 Correct 101 ms 14188 KB Output is correct
27 Correct 248 ms 23916 KB Output is correct
28 Correct 258 ms 25068 KB Output is correct
29 Correct 105 ms 14232 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 64 ms 6380 KB Output is correct
5 Correct 251 ms 24196 KB Output is correct
6 Correct 254 ms 24044 KB Output is correct
7 Correct 261 ms 24940 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 63 ms 6380 KB Output is correct
10 Correct 253 ms 24300 KB Output is correct
11 Correct 249 ms 24044 KB Output is correct
12 Correct 258 ms 24984 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Incorrect 1 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 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 10 ms 1388 KB Output is correct
7 Correct 242 ms 24212 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 384 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 1260 KB Output is correct
13 Correct 245 ms 22252 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 110 ms 14316 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 64 ms 5868 KB Output is correct
21 Correct 251 ms 22508 KB Output is correct
22 Correct 253 ms 22252 KB Output is correct
23 Correct 260 ms 23188 KB Output is correct
24 Correct 252 ms 22252 KB Output is correct
25 Correct 103 ms 12524 KB Output is correct
26 Correct 100 ms 12268 KB Output is correct
27 Correct 259 ms 23188 KB Output is correct
28 Correct 248 ms 22252 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 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 1388 KB Output is correct
37 Correct 249 ms 23916 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 242 ms 25964 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 109 ms 15980 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 64 ms 6380 KB Output is correct
50 Correct 258 ms 24172 KB Output is correct
51 Correct 249 ms 24044 KB Output is correct
52 Correct 263 ms 24940 KB Output is correct
53 Correct 104 ms 14096 KB Output is correct
54 Correct 101 ms 14188 KB Output is correct
55 Correct 248 ms 23916 KB Output is correct
56 Correct 258 ms 25068 KB Output is correct
57 Correct 105 ms 14232 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 1132 KB Output is correct
61 Correct 111 ms 17900 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 64 ms 6400 KB Too many ways to get from 1 to 183, 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 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 10 ms 1388 KB Output is correct
7 Correct 242 ms 24212 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 384 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 1260 KB Output is correct
13 Correct 245 ms 22252 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 110 ms 14316 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 64 ms 5868 KB Output is correct
21 Correct 251 ms 22508 KB Output is correct
22 Correct 253 ms 22252 KB Output is correct
23 Correct 260 ms 23188 KB Output is correct
24 Correct 252 ms 22252 KB Output is correct
25 Correct 103 ms 12524 KB Output is correct
26 Correct 100 ms 12268 KB Output is correct
27 Correct 259 ms 23188 KB Output is correct
28 Correct 248 ms 22252 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 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 1388 KB Output is correct
37 Correct 249 ms 23916 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 242 ms 25964 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 109 ms 15980 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 64 ms 6380 KB Output is correct
50 Correct 258 ms 24172 KB Output is correct
51 Correct 249 ms 24044 KB Output is correct
52 Correct 263 ms 24940 KB Output is correct
53 Correct 104 ms 14096 KB Output is correct
54 Correct 101 ms 14188 KB Output is correct
55 Correct 248 ms 23916 KB Output is correct
56 Correct 258 ms 25068 KB Output is correct
57 Correct 105 ms 14232 KB Output is correct
58 Correct 1 ms 364 KB Output is correct
59 Correct 1 ms 364 KB Output is correct
60 Correct 1 ms 364 KB Output is correct
61 Correct 64 ms 6380 KB Output is correct
62 Correct 251 ms 24196 KB Output is correct
63 Correct 254 ms 24044 KB Output is correct
64 Correct 261 ms 24940 KB Output is correct
65 Correct 1 ms 364 KB Output is correct
66 Correct 63 ms 6380 KB Output is correct
67 Correct 253 ms 24300 KB Output is correct
68 Correct 249 ms 24044 KB Output is correct
69 Correct 258 ms 24984 KB Output is correct
70 Correct 1 ms 364 KB Output is correct
71 Correct 1 ms 364 KB Output is correct
72 Incorrect 1 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 -