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Submission #1073148

# Submission time Handle Problem Language Result Execution time Memory
1073148 2024-08-24T09:51:31 Z TheQuantiX Connecting Supertrees (IOI20_supertrees) C++17
40 / 100
 223 ms 23588 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
 
using namespace std;
using ll = long long;
 
ll n, m, q, k, x, y, a, b, c;
 
struct dsu {
    ll n;
    vector<ll> par;
    vector<ll> sz;
 
    dsu(ll N) : n(N) {
        par.resize(n);
        sz.resize(n);
        for (int i = 0; i < n; i++) {
            par[i] = i;
            sz[i] = 1;
        }
    }
 
    ll find_p(ll x) {
        if (par[x] == x) {
            return x;
        }
        ll p = find_p(par[x]);
        par[x] = p;
        return p;
    }
 
    void join(ll x, ll y) {
        x = find_p(x);
        y = find_p(y);
        if (x == y) {
            return;
        }
        if (sz[y] > sz[x]) {
            swap(x, y);
        }
        par[y] = x;
        sz[x] += sz[y];
    }
};
 
int construct(vector< vector<int> > p) {
    n = p.size();
    vector< vector<int> > ans(n, vector<int>(n));
    vector< vector<ll> > comp(n);
    vector< vector<ll> > comp2(n);
    dsu d(n);
    bitset<1000> bt;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) {
            if (p[i][j] == 1) {
                d.join(i, j);
                bt.set(i);
                bt.set(j);
            }
        }
    }
    for (int i = 0; i < n; i++) {
        if (!bt[i]) {
            continue;
        }
        comp[d.find_p(i)].push_back(i);
    }
    for (auto i : comp) {
        for (int j : i) {
            for (int k : i) {
                if (p[j][k] != 1) {
                    return 0;
                }
            }
        }
    }
    for (auto i : comp) {
        if (i.size() <= 1) {
            continue;
        }
        for (int j = 0; j < i.size() - 1; j++) {
            ans[i[(j + 1) % i.size()]][i[j]] = 1;
            ans[i[j]][i[(j + 1) % i.size()]] = 1;
        }
    }
    for (int i = 0; i < n; i++) {
        set<ll> st2;
        for (int j : comp[i]) {
            for (int k = 0; k < n; k++) {
                if (p[j][k] == 2) {
                    // if (bt[k]) {
                    //     return 0;
                    // }
                    st2.insert(k);
                }
            }
        }
        // cout << i << ' ' << st2.size() << '\n';
        for (int j : st2) {
            comp2[i].push_back(j);
            bt.set(j);
        }
    }
    for (auto i : comp2) {
        if (i.size() == 1) {
            return 0;
        }
        for (int j : i) {
            for (int k : i) {
                if (j != k && p[j][k] != 2) {
                    return 0;
                }
            }
        }
    }
    for (auto i = 0; i < n; i++) {
        for (int j : comp[i]) {
            for (int k : comp2[i]) {
                if (p[j][k] != 2) {
                    return 0;
                }
            }
        }
    }
    // cout << "DEBUG" << endl;
    for (auto i = 0; i < n; i++) {
        if (comp2[i].size() == 0) {
            continue;
        }
        comp2[i].push_back(i);
        for (int j = 0; j < comp2[i].size(); j++) {
            ans[comp2[i][(j + 1) % comp2[i].size()]][comp2[i][j]] = 1;
            ans[comp2[i][j]][comp2[i][(j + 1) % comp2[i].size()]] = 1;
        }
    }
    vector< vector<ll> > comp2i(n);
    dsu d2(n);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) {
            if (bt[i] && !bt[j] && p[i][j] != 0) {
                return 0;
            }
            if (!bt[i] && bt[j] && p[i][j] != 0) {
                return 0;
            }
            if (!bt[i] && !bt[j] && p[i][j] == 2) {
                d2.join(i, j);
            }
        }
    }
    for (int i = 0; i < n; i++) {
        comp2i[d2.find_p(i)].push_back(i);
    }
    for (auto i : comp2i) {
        if (i.size() == 2) {
            return 0;
        }
        for (int j : i) {
            for (int k : i) {
                if (p[j][k] == 0) {
                    return 0;
                }
            }
        }
    }
    for (auto i : comp2i) {
        if (i.size() == 1) {
            continue;
        }
        for (int j = 0; j < i.size(); j++) {
            ans[i[(j + 1) % i.size()]][i[j]] = 1;
            ans[i[j]][i[(j + 1) % i.size()]] = 1;
        }
    }
    build(ans);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:81:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |         for (int j = 0; j < i.size() - 1; j++) {
      |                         ~~^~~~~~~~~~~~~~
supertrees.cpp:131:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  131 |         for (int j = 0; j < comp2[i].size(); j++) {
      |                         ~~^~~~~~~~~~~~~~~~~
supertrees.cpp:170:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |         for (int j = 0; j < i.size(); j++) {
      |                         ~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 432 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 182 ms 23492 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 432 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 182 ms 23492 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 5 ms 1372 KB Output is correct
13 Correct 223 ms 23356 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 64 ms 13396 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 604 KB Output is correct
20 Correct 30 ms 6324 KB Output is correct
21 Correct 158 ms 23376 KB Output is correct
22 Correct 120 ms 23380 KB Output is correct
23 Correct 192 ms 23484 KB Output is correct
24 Correct 153 ms 23588 KB Output is correct
25 Correct 75 ms 13488 KB Output is correct
26 Correct 61 ms 13648 KB Output is correct
27 Correct 142 ms 23472 KB Output is correct
28 Correct 120 ms 23376 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 5 ms 1372 KB Output is correct
9 Correct 140 ms 23480 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 1368 KB Output is correct
13 Correct 154 ms 23560 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 5 ms 964 KB Output is correct
17 Correct 113 ms 13636 KB Output is correct
18 Correct 1 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 604 KB Output is correct
21 Correct 38 ms 6220 KB Output is correct
22 Correct 194 ms 23380 KB Output is correct
23 Correct 180 ms 23376 KB Output is correct
24 Correct 180 ms 23376 KB Output is correct
25 Correct 111 ms 13628 KB Output is correct
26 Correct 113 ms 13652 KB Output is correct
27 Correct 132 ms 23536 KB Output is correct
28 Correct 156 ms 23380 KB Output is correct
29 Correct 67 ms 13520 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 32 ms 6324 KB Output is correct
5 Correct 144 ms 23380 KB Output is correct
6 Correct 149 ms 23376 KB Output is correct
7 Correct 140 ms 23588 KB Output is correct
8 Correct 0 ms 432 KB Output is correct
9 Correct 30 ms 6352 KB Output is correct
10 Correct 176 ms 23376 KB Output is correct
11 Correct 124 ms 23556 KB Output is correct
12 Correct 123 ms 23380 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Incorrect 14 ms 3932 KB Answer gives possible 0 while actual possible 1
17 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 432 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 182 ms 23492 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 5 ms 1372 KB Output is correct
13 Correct 223 ms 23356 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 64 ms 13396 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 604 KB Output is correct
20 Correct 30 ms 6324 KB Output is correct
21 Correct 158 ms 23376 KB Output is correct
22 Correct 120 ms 23380 KB Output is correct
23 Correct 192 ms 23484 KB Output is correct
24 Correct 153 ms 23588 KB Output is correct
25 Correct 75 ms 13488 KB Output is correct
26 Correct 61 ms 13648 KB Output is correct
27 Correct 142 ms 23472 KB Output is correct
28 Correct 120 ms 23376 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 5 ms 1372 KB Output is correct
37 Correct 140 ms 23480 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 5 ms 1368 KB Output is correct
41 Correct 154 ms 23560 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 5 ms 964 KB Output is correct
45 Correct 113 ms 13636 KB Output is correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 604 KB Output is correct
49 Correct 38 ms 6220 KB Output is correct
50 Correct 194 ms 23380 KB Output is correct
51 Correct 180 ms 23376 KB Output is correct
52 Correct 180 ms 23376 KB Output is correct
53 Correct 111 ms 13628 KB Output is correct
54 Correct 113 ms 13652 KB Output is correct
55 Correct 132 ms 23536 KB Output is correct
56 Correct 156 ms 23380 KB Output is correct
57 Correct 67 ms 13520 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 3 ms 860 KB Output is correct
61 Correct 60 ms 13396 KB Output is correct
62 Correct 0 ms 604 KB Output is correct
63 Correct 1 ms 388 KB Output is correct
64 Correct 0 ms 360 KB Output is correct
65 Incorrect 28 ms 3928 KB Answer gives possible 0 while actual possible 1
66 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 432 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 182 ms 23492 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 5 ms 1372 KB Output is correct
13 Correct 223 ms 23356 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 64 ms 13396 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 604 KB Output is correct
20 Correct 30 ms 6324 KB Output is correct
21 Correct 158 ms 23376 KB Output is correct
22 Correct 120 ms 23380 KB Output is correct
23 Correct 192 ms 23484 KB Output is correct
24 Correct 153 ms 23588 KB Output is correct
25 Correct 75 ms 13488 KB Output is correct
26 Correct 61 ms 13648 KB Output is correct
27 Correct 142 ms 23472 KB Output is correct
28 Correct 120 ms 23376 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 5 ms 1372 KB Output is correct
37 Correct 140 ms 23480 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 5 ms 1368 KB Output is correct
41 Correct 154 ms 23560 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 5 ms 964 KB Output is correct
45 Correct 113 ms 13636 KB Output is correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 604 KB Output is correct
49 Correct 38 ms 6220 KB Output is correct
50 Correct 194 ms 23380 KB Output is correct
51 Correct 180 ms 23376 KB Output is correct
52 Correct 180 ms 23376 KB Output is correct
53 Correct 111 ms 13628 KB Output is correct
54 Correct 113 ms 13652 KB Output is correct
55 Correct 132 ms 23536 KB Output is correct
56 Correct 156 ms 23380 KB Output is correct
57 Correct 67 ms 13520 KB Output is correct
58 Correct 1 ms 344 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 32 ms 6324 KB Output is correct
62 Correct 144 ms 23380 KB Output is correct
63 Correct 149 ms 23376 KB Output is correct
64 Correct 140 ms 23588 KB Output is correct
65 Correct 0 ms 432 KB Output is correct
66 Correct 30 ms 6352 KB Output is correct
67 Correct 176 ms 23376 KB Output is correct
68 Correct 124 ms 23556 KB Output is correct
69 Correct 123 ms 23380 KB Output is correct
70 Correct 0 ms 344 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Incorrect 14 ms 3932 KB Answer gives possible 0 while actual possible 1
74 Halted 0 ms 0 KB -