oj.uz

Submission #779180

# Submission time Handle Problem Language Result Execution time Memory
779180 2023-07-11T08:44:20 Z kamelfanger83 Connecting Supertrees (IOI20_supertrees) C++17
56 / 100
 171 ms 22024 KB 
#include "supertrees.h"
#include <vector>
#include <cassert>
#include <numeric>

using namespace std;

template <typename T>
bool operator==(vector<T> &a, vector<T> &b){
    for (int i = 0; i < a.size(); ++i) {
        if (a[i] != b[i]) return false;
    }
    return true;
}

template <typename T>
bool operator!=(vector<T> &a, vector<T> &b){
    return !(a==b);
}

struct Unionfind {
    vector<int> group;
    Unionfind(int n) {
        group.resize(n);
        iota(group.begin(), group.end(), 0);
    }
    int find(int i){
        if (group[i] == i) return i;
        return group[i] = find(group[i]);
    }
    void merge(int a, int b){
        a = find(a); b = find(b);
        if (a == b) return;
        group[b] = group[a];
    }
};

int construct(vector<vector<int>> p) {
    int n = p.size();
    vector<vector<int>> res (n);
    vector<bool> inc (n);

    Unionfind unionfind (n);
    
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (p[i][j] != 0) unionfind.merge(i, j); 
        }
    }

    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (p[i][j] == 0 && unionfind.find(i) == unionfind.find(j)) return 0;
        }
    }

    for (int i = 0; i < n; ++i) {
        if (!res[i].empty()) continue;
        res[i].assign(n, 0);
        inc[i] = true;
        for (int j = 0; j < n; ++j) {
            if (p[i][j] == 0 || i == j) continue;
            if (p[i][j] == 1){
                if (p[i] != p[j]) return 0;
                res[j].assign(n, 0);
                res[j][i] = 1;
                res[i][j] = 1;
            }
        }
    }

    for (int i = 0; i < n; ++i) {
        if (!inc[i]) continue;
        int ft = -1, lt = -1, bt = -1, at = -1;
        for (int j = 0; j < n; ++j) {
            if (p[i][j] == 2 && inc[j]){
                if (ft == -1) ft = j;
                if (j < i) bt = j;
                if (j > i && at == -1) at = j;
                lt = j;
            }
        }
        if (lt == -1) continue;
        if (at == -1) at = ft;
        if (bt == -1) bt = lt;
        res[i][bt] = 1;
        res[i][at] = 1;
    }

    build(res);
    return 1;
}

Compilation message

supertrees.cpp: In instantiation of 'bool operator==(std::vector<T>&, std::vector<T>&) [with T = int]':
supertrees.cpp:18:15:   required from 'bool operator!=(std::vector<T>&, std::vector<T>&) [with T = int]'
supertrees.cpp:64:32:   required from here
supertrees.cpp:10:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for (int i = 0; i < a.size(); ++i) {
      |                     ~~^~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 138 ms 21972 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 138 ms 21972 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1088 KB Output is correct
13 Correct 147 ms 22008 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 596 KB Output is correct
17 Correct 65 ms 8196 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 40 ms 5756 KB Output is correct
21 Correct 144 ms 22008 KB Output is correct
22 Correct 171 ms 22008 KB Output is correct
23 Correct 142 ms 21956 KB Output is correct
24 Correct 137 ms 21916 KB Output is correct
25 Correct 59 ms 8180 KB Output is correct
26 Correct 56 ms 8188 KB Output is correct
27 Correct 149 ms 22016 KB Output is correct
28 Correct 140 ms 22024 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 35 ms 5708 KB Output is correct
5 Correct 138 ms 22020 KB Output is correct
6 Correct 140 ms 21964 KB Output is correct
7 Correct 146 ms 21960 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 35 ms 5760 KB Output is correct
10 Correct 139 ms 22016 KB Output is correct
11 Correct 155 ms 22020 KB Output is correct
12 Correct 146 ms 21924 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 41 ms 5708 KB Output is correct
17 Correct 146 ms 22024 KB Output is correct
18 Correct 140 ms 22008 KB Output is correct
19 Correct 139 ms 21964 KB Output is correct
20 Correct 139 ms 22020 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 138 ms 21972 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1088 KB Output is correct
13 Correct 147 ms 22008 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 596 KB Output is correct
17 Correct 65 ms 8196 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 40 ms 5756 KB Output is correct
21 Correct 144 ms 22008 KB Output is correct
22 Correct 171 ms 22008 KB Output is correct
23 Correct 142 ms 21956 KB Output is correct
24 Correct 137 ms 21916 KB Output is correct
25 Correct 59 ms 8180 KB Output is correct
26 Correct 56 ms 8188 KB Output is correct
27 Correct 149 ms 22016 KB Output is correct
28 Correct 140 ms 22024 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 138 ms 21972 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 7 ms 1088 KB Output is correct
13 Correct 147 ms 22008 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 596 KB Output is correct
17 Correct 65 ms 8196 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 40 ms 5756 KB Output is correct
21 Correct 144 ms 22008 KB Output is correct
22 Correct 171 ms 22008 KB Output is correct
23 Correct 142 ms 21956 KB Output is correct
24 Correct 137 ms 21916 KB Output is correct
25 Correct 59 ms 8180 KB Output is correct
26 Correct 56 ms 8188 KB Output is correct
27 Correct 149 ms 22016 KB Output is correct
28 Correct 140 ms 22024 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Incorrect 0 ms 212 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -