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Submission #1046275

# Submission time Handle Problem Language Result Execution time Memory
1046275 2024-08-06T12:22:08 Z vanea Connecting Supertrees (IOI20_supertrees) C++14
40 / 100
 114 ms 24152 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;
using ll = long long;
using ld = long double;

const int mxN = 1e3+10;

int p[mxN];

vector<int> adj[mxN];
int type[mxN];

int get(int x) {
    return p[x] < 0 ? x : p[x] = get(p[x]);
}

void uni(int a, int b) {
    a = get(a); b = get(b);
    if(a == b) return ;
    if(p[a] > p[b]) swap(a, b);
    p[a] += p[b];
    p[b] = a;
}

int construct(vector<vector<int>> P) {
    int n = P.size();
    for(int i = 0; i < n; i++) p[i] = -1;
    for(int i = 0; i < n; i++) {
        for(int j = i+1; j < n; j++) {
            if(P[i][j] == 1 && (get(i) != get(j))) {
                uni(i, j);
                adj[i].push_back(j);
                adj[j].push_back(i);
                type[i] = 1; type[j] = 1;
            }
        }
    }
    bool pos = true;
    for(int i = 0; i < n; i++) {
        vector<int> v;
        for(int j = 0; j < n; j++) {
            if(i == j) continue;
            if(P[i][j] == 2 && (get(j) != get(i))) v.push_back(j);
        }
        if(v.empty()) continue;
        if(v.size() == 1) {
            pos = false;
            break;
        }
        int x = get(i);
        for(int i = 0; i + 1 < v.size(); i++) {
            adj[v[i]].push_back(v[i+1]);
            adj[v[i+1]].push_back(v[i]);
            uni(v[i], v[i+1]);
            type[v[i]] = 2;
            type[v[i+1]] = 2;
        }
        adj[x].push_back(v[0]);
        adj[v[0]].push_back(x);
        adj[v[v.size()-1]].push_back(x);
        adj[x].push_back(v[v.size()-1]);
        uni(x, v[0]);
    }
    if(!pos) return 0;
    for(int i = 0; i < n; i++) {
        for(int j = i+1; j < n; j++) {
            if(P[i][j]) {
                if(get(i) != get(j)) pos = false;
                else {
                    if(P[i][j] == 1) {
                        if(type[i] != 1 || type[j] != 1) pos = false;
                    }
                    else {
                        if(type[i] == 1 && type[j] == 1) pos = false;
                    }
                }
            }
            else {
                if(get(i) == get(j)) pos = false;
            }
        }
    }
    if(!pos) return 0;
    vector<vector<int>> ans(n, vector<int>(n));
    for(int i = 0; i < n; i++) {
        for(auto it : adj[i]) {
            ans[i][it] = ans[it][i] = 1;
        }
    }
    build(ans);
    return 1;
}

/*
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    vector<vector<int>> a = {{1, 1, 2, 2}, {1, 1, 2, 2}, {2, 2, 1, 2}, {2, 2, 2, 1}};
    cout << construct(a);
}*/

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:52:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |         for(int i = 0; i + 1 < v.size(); i++) {
      |                        ~~~~~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 4 ms 1380 KB Output is correct
7 Correct 99 ms 23980 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 4 ms 1380 KB Output is correct
7 Correct 99 ms 23980 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1356 KB Output is correct
13 Correct 97 ms 23972 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 872 KB Output is correct
17 Correct 52 ms 10324 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 24 ms 6268 KB Output is correct
21 Correct 102 ms 23960 KB Output is correct
22 Correct 95 ms 24108 KB Output is correct
23 Correct 100 ms 24144 KB Output is correct
24 Correct 95 ms 24100 KB Output is correct
25 Correct 43 ms 10572 KB Output is correct
26 Correct 41 ms 10276 KB Output is correct
27 Correct 101 ms 24084 KB Output is correct
28 Correct 93 ms 24148 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 0 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 4 ms 1372 KB Output is correct
9 Correct 92 ms 23976 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1220 KB Output is correct
13 Correct 94 ms 24104 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 860 KB Output is correct
17 Correct 45 ms 10160 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 29 ms 6272 KB Output is correct
22 Correct 102 ms 24148 KB Output is correct
23 Correct 93 ms 24148 KB Output is correct
24 Correct 101 ms 24100 KB Output is correct
25 Correct 40 ms 10076 KB Output is correct
26 Correct 41 ms 10320 KB Output is correct
27 Correct 93 ms 24144 KB Output is correct
28 Correct 99 ms 24148 KB Output is correct
29 Correct 40 ms 10064 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 24 ms 6424 KB Output is correct
5 Correct 100 ms 24104 KB Output is correct
6 Correct 95 ms 24104 KB Output is correct
7 Correct 100 ms 24144 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 24 ms 6236 KB Output is correct
10 Correct 107 ms 24148 KB Output is correct
11 Correct 95 ms 24148 KB Output is correct
12 Correct 114 ms 24152 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Incorrect 11 ms 2856 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 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 4 ms 1380 KB Output is correct
7 Correct 99 ms 23980 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1356 KB Output is correct
13 Correct 97 ms 23972 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 872 KB Output is correct
17 Correct 52 ms 10324 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 24 ms 6268 KB Output is correct
21 Correct 102 ms 23960 KB Output is correct
22 Correct 95 ms 24108 KB Output is correct
23 Correct 100 ms 24144 KB Output is correct
24 Correct 95 ms 24100 KB Output is correct
25 Correct 43 ms 10572 KB Output is correct
26 Correct 41 ms 10276 KB Output is correct
27 Correct 101 ms 24084 KB Output is correct
28 Correct 93 ms 24148 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 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 4 ms 1372 KB Output is correct
37 Correct 92 ms 23976 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 4 ms 1220 KB Output is correct
41 Correct 94 ms 24104 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Correct 45 ms 10160 KB Output is correct
46 Correct 1 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 29 ms 6272 KB Output is correct
50 Correct 102 ms 24148 KB Output is correct
51 Correct 93 ms 24148 KB Output is correct
52 Correct 101 ms 24100 KB Output is correct
53 Correct 40 ms 10076 KB Output is correct
54 Correct 41 ms 10320 KB Output is correct
55 Correct 93 ms 24144 KB Output is correct
56 Correct 99 ms 24148 KB Output is correct
57 Correct 40 ms 10064 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 53 ms 10332 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Incorrect 11 ms 2856 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 1 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 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 4 ms 1380 KB Output is correct
7 Correct 99 ms 23980 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 4 ms 1356 KB Output is correct
13 Correct 97 ms 23972 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 872 KB Output is correct
17 Correct 52 ms 10324 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 24 ms 6268 KB Output is correct
21 Correct 102 ms 23960 KB Output is correct
22 Correct 95 ms 24108 KB Output is correct
23 Correct 100 ms 24144 KB Output is correct
24 Correct 95 ms 24100 KB Output is correct
25 Correct 43 ms 10572 KB Output is correct
26 Correct 41 ms 10276 KB Output is correct
27 Correct 101 ms 24084 KB Output is correct
28 Correct 93 ms 24148 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 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 4 ms 1372 KB Output is correct
37 Correct 92 ms 23976 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 4 ms 1220 KB Output is correct
41 Correct 94 ms 24104 KB Output is correct
42 Correct 1 ms 348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 2 ms 860 KB Output is correct
45 Correct 45 ms 10160 KB Output is correct
46 Correct 1 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 29 ms 6272 KB Output is correct
50 Correct 102 ms 24148 KB Output is correct
51 Correct 93 ms 24148 KB Output is correct
52 Correct 101 ms 24100 KB Output is correct
53 Correct 40 ms 10076 KB Output is correct
54 Correct 41 ms 10320 KB Output is correct
55 Correct 93 ms 24144 KB Output is correct
56 Correct 99 ms 24148 KB Output is correct
57 Correct 40 ms 10064 KB Output is correct
58 Correct 0 ms 344 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 1 ms 348 KB Output is correct
61 Correct 24 ms 6424 KB Output is correct
62 Correct 100 ms 24104 KB Output is correct
63 Correct 95 ms 24104 KB Output is correct
64 Correct 100 ms 24144 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 24 ms 6236 KB Output is correct
67 Correct 107 ms 24148 KB Output is correct
68 Correct 95 ms 24148 KB Output is correct
69 Correct 114 ms 24152 KB Output is correct
70 Correct 1 ms 348 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Incorrect 11 ms 2856 KB Answer gives possible 0 while actual possible 1
74 Halted 0 ms 0 KB -