oj.uz

Submission #779204

# Submission time Handle Problem Language Result Execution time Memory
779204 2023-07-11T08:57:08 Z kamelfanger83 Connecting Supertrees (IOI20_supertrees) C++17
56 / 100
 198 ms 22028 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 (i == j) continue;
            if (inc[j] && (unionfind.find(i) == unionfind.find(j))){
                if (p[i][j] != 2) return 0;
                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 0 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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 6 ms 1108 KB Output is correct
7 Correct 152 ms 22004 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 6 ms 1108 KB Output is correct
7 Correct 152 ms 22004 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 6 ms 1128 KB Output is correct
13 Correct 150 ms 22012 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 616 KB Output is correct
17 Correct 71 ms 8184 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 45 ms 5704 KB Output is correct
21 Correct 163 ms 21996 KB Output is correct
22 Correct 157 ms 22020 KB Output is correct
23 Correct 155 ms 22012 KB Output is correct
24 Correct 150 ms 21976 KB Output is correct
25 Correct 77 ms 8140 KB Output is correct
26 Correct 89 ms 8184 KB Output is correct
27 Correct 151 ms 21940 KB Output is correct
28 Correct 156 ms 21920 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 0 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 0 ms 256 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 37 ms 5684 KB Output is correct
5 Correct 149 ms 21916 KB Output is correct
6 Correct 150 ms 22004 KB Output is correct
7 Correct 155 ms 22024 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 39 ms 5644 KB Output is correct
10 Correct 198 ms 22028 KB Output is correct
11 Correct 155 ms 21964 KB Output is correct
12 Correct 159 ms 21964 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 38 ms 5708 KB Output is correct
17 Correct 159 ms 21968 KB Output is correct
18 Correct 157 ms 21964 KB Output is correct
19 Correct 151 ms 22024 KB Output is correct
20 Correct 152 ms 21956 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 6 ms 1108 KB Output is correct
7 Correct 152 ms 22004 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 6 ms 1128 KB Output is correct
13 Correct 150 ms 22012 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 616 KB Output is correct
17 Correct 71 ms 8184 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 45 ms 5704 KB Output is correct
21 Correct 163 ms 21996 KB Output is correct
22 Correct 157 ms 22020 KB Output is correct
23 Correct 155 ms 22012 KB Output is correct
24 Correct 150 ms 21976 KB Output is correct
25 Correct 77 ms 8140 KB Output is correct
26 Correct 89 ms 8184 KB Output is correct
27 Correct 151 ms 21940 KB Output is correct
28 Correct 156 ms 21920 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 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 0 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 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 6 ms 1108 KB Output is correct
7 Correct 152 ms 22004 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 6 ms 1128 KB Output is correct
13 Correct 150 ms 22012 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 616 KB Output is correct
17 Correct 71 ms 8184 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 45 ms 5704 KB Output is correct
21 Correct 163 ms 21996 KB Output is correct
22 Correct 157 ms 22020 KB Output is correct
23 Correct 155 ms 22012 KB Output is correct
24 Correct 150 ms 21976 KB Output is correct
25 Correct 77 ms 8140 KB Output is correct
26 Correct 89 ms 8184 KB Output is correct
27 Correct 151 ms 21940 KB Output is correct
28 Correct 156 ms 21920 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 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 -