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Submission #1046298

# Submission time Handle Problem Language Result Execution time Memory
1046298 2024-08-06T12:38:01 Z vanea Connecting Supertrees (IOI20_supertrees) C++14
40 / 100
 114 ms 22208 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 = 0; j < n; j++) {
            if(i == j) continue;
            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 = 0; j < n; j++) {
            if(i == j) continue;
            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, 1, 1, 1, 1, 2, 2, 2},
    {1, 1, 1, 1, 1, 1, 2, 2, 2},
    {1, 1, 1, 1, 1, 1, 2, 2, 2},
    {1, 1, 1, 1, 1, 1, 2, 2, 2},
    {1, 1, 1, 1, 1, 1, 2, 2, 2},
    {1, 1, 1, 1, 1, 1, 2, 2, 2},
    {2, 2, 2, 2, 2, 2, 1, 2, 2},
    {2, 2, 2, 2, 2, 2, 2, 1, 2},
    {2, 2, 2, 2, 2, 2, 2, 2, 1}};
    cout << construct(a);
}*/

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:53:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for(int i = 0; i + 1 < v.size(); i++) {
      |                        ~~~~~~^~~~~~~~~~

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 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1116 KB Output is correct
7 Correct 99 ms 22208 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 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1116 KB Output is correct
7 Correct 99 ms 22208 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 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 1116 KB Output is correct
13 Correct 98 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 56 ms 8248 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 25 ms 5724 KB Output is correct
21 Correct 98 ms 22100 KB Output is correct
22 Correct 96 ms 22096 KB Output is correct
23 Correct 102 ms 22068 KB Output is correct
24 Correct 99 ms 22096 KB Output is correct
25 Correct 47 ms 8276 KB Output is correct
26 Correct 43 ms 8276 KB Output is correct
27 Correct 103 ms 22100 KB Output is correct
28 Correct 96 ms 22100 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 1112 KB Output is correct
9 Correct 99 ms 22068 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 1372 KB Output is correct
13 Correct 114 ms 22064 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 44 ms 8252 KB Output is correct
18 Correct 0 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 24 ms 5744 KB Output is correct
22 Correct 98 ms 22072 KB Output is correct
23 Correct 99 ms 22100 KB Output is correct
24 Correct 108 ms 22100 KB Output is correct
25 Correct 40 ms 8276 KB Output is correct
26 Correct 41 ms 8272 KB Output is correct
27 Correct 95 ms 22100 KB Output is correct
28 Correct 102 ms 22100 KB Output is correct
29 Correct 40 ms 8276 KB Output is correct

Subtask #4
0 / 35.0

# 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 24 ms 5744 KB Output is correct
5 Correct 103 ms 22068 KB Output is correct
6 Correct 99 ms 22172 KB Output is correct
7 Correct 103 ms 22056 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 24 ms 5896 KB Output is correct
10 Correct 100 ms 22076 KB Output is correct
11 Correct 96 ms 22068 KB Output is correct
12 Correct 101 ms 22096 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Incorrect 11 ms 2396 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 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1116 KB Output is correct
7 Correct 99 ms 22208 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 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 1116 KB Output is correct
13 Correct 98 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 56 ms 8248 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 25 ms 5724 KB Output is correct
21 Correct 98 ms 22100 KB Output is correct
22 Correct 96 ms 22096 KB Output is correct
23 Correct 102 ms 22068 KB Output is correct
24 Correct 99 ms 22096 KB Output is correct
25 Correct 47 ms 8276 KB Output is correct
26 Correct 43 ms 8276 KB Output is correct
27 Correct 103 ms 22100 KB Output is correct
28 Correct 96 ms 22100 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 1112 KB Output is correct
37 Correct 99 ms 22068 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 1372 KB Output is correct
41 Correct 114 ms 22064 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 2 ms 604 KB Output is correct
45 Correct 44 ms 8252 KB Output is correct
46 Correct 0 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 24 ms 5744 KB Output is correct
50 Correct 98 ms 22072 KB Output is correct
51 Correct 99 ms 22100 KB Output is correct
52 Correct 108 ms 22100 KB Output is correct
53 Correct 40 ms 8276 KB Output is correct
54 Correct 41 ms 8272 KB Output is correct
55 Correct 95 ms 22100 KB Output is correct
56 Correct 102 ms 22100 KB Output is correct
57 Correct 40 ms 8276 KB Output is correct
58 Correct 1 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 3 ms 604 KB Output is correct
61 Correct 58 ms 8248 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 344 KB Output is correct
65 Incorrect 12 ms 2396 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 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1116 KB Output is correct
7 Correct 99 ms 22208 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 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 1116 KB Output is correct
13 Correct 98 ms 22096 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 56 ms 8248 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 25 ms 5724 KB Output is correct
21 Correct 98 ms 22100 KB Output is correct
22 Correct 96 ms 22096 KB Output is correct
23 Correct 102 ms 22068 KB Output is correct
24 Correct 99 ms 22096 KB Output is correct
25 Correct 47 ms 8276 KB Output is correct
26 Correct 43 ms 8276 KB Output is correct
27 Correct 103 ms 22100 KB Output is correct
28 Correct 96 ms 22100 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 1112 KB Output is correct
37 Correct 99 ms 22068 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 1372 KB Output is correct
41 Correct 114 ms 22064 KB Output is correct
42 Correct 1 ms 344 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 2 ms 604 KB Output is correct
45 Correct 44 ms 8252 KB Output is correct
46 Correct 0 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 24 ms 5744 KB Output is correct
50 Correct 98 ms 22072 KB Output is correct
51 Correct 99 ms 22100 KB Output is correct
52 Correct 108 ms 22100 KB Output is correct
53 Correct 40 ms 8276 KB Output is correct
54 Correct 41 ms 8272 KB Output is correct
55 Correct 95 ms 22100 KB Output is correct
56 Correct 102 ms 22100 KB Output is correct
57 Correct 40 ms 8276 KB Output is correct
58 Correct 0 ms 348 KB Output is correct
59 Correct 0 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 24 ms 5744 KB Output is correct
62 Correct 103 ms 22068 KB Output is correct
63 Correct 99 ms 22172 KB Output is correct
64 Correct 103 ms 22056 KB Output is correct
65 Correct 1 ms 344 KB Output is correct
66 Correct 24 ms 5896 KB Output is correct
67 Correct 100 ms 22076 KB Output is correct
68 Correct 96 ms 22068 KB Output is correct
69 Correct 101 ms 22096 KB Output is correct
70 Correct 1 ms 344 KB Output is correct
71 Correct 0 ms 344 KB Output is correct
72 Correct 1 ms 344 KB Output is correct
73 Incorrect 11 ms 2396 KB Answer gives possible 0 while actual possible 1
74 Halted 0 ms 0 KB -