oj.uz

Submission #779187

# Submission time Handle Problem Language Result Execution time Memory
779187 2023-07-11T08:49:44 Z kamelfanger83 Connecting Supertrees (IOI20_supertrees) C++17
56 / 100
 177 ms 22596 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 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 139 ms 22448 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 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 139 ms 22448 KB Output is correct
8 Correct 1 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 1108 KB Output is correct
13 Correct 138 ms 22212 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 72 ms 8308 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 34 ms 5852 KB Output is correct
21 Correct 136 ms 22092 KB Output is correct
22 Correct 144 ms 22060 KB Output is correct
23 Correct 140 ms 22056 KB Output is correct
24 Correct 136 ms 22048 KB Output is correct
25 Correct 58 ms 8204 KB Output is correct
26 Correct 57 ms 8316 KB Output is correct
27 Correct 140 ms 22092 KB Output is correct
28 Correct 136 ms 22088 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 0 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 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 5800 KB Output is correct
5 Correct 152 ms 22276 KB Output is correct
6 Correct 177 ms 22240 KB Output is correct
7 Correct 141 ms 22272 KB Output is correct
8 Correct 1 ms 256 KB Output is correct
9 Correct 35 ms 5836 KB Output is correct
10 Correct 141 ms 22256 KB Output is correct
11 Correct 141 ms 22256 KB Output is correct
12 Correct 144 ms 22244 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 35 ms 5896 KB Output is correct
17 Correct 142 ms 22596 KB Output is correct
18 Correct 140 ms 22436 KB Output is correct
19 Correct 139 ms 22432 KB Output is correct
20 Correct 140 ms 22552 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 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 139 ms 22448 KB Output is correct
8 Correct 1 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 1108 KB Output is correct
13 Correct 138 ms 22212 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 72 ms 8308 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 34 ms 5852 KB Output is correct
21 Correct 136 ms 22092 KB Output is correct
22 Correct 144 ms 22060 KB Output is correct
23 Correct 140 ms 22056 KB Output is correct
24 Correct 136 ms 22048 KB Output is correct
25 Correct 58 ms 8204 KB Output is correct
26 Correct 57 ms 8316 KB Output is correct
27 Correct 140 ms 22092 KB Output is correct
28 Correct 136 ms 22088 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 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 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 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 139 ms 22448 KB Output is correct
8 Correct 1 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 1108 KB Output is correct
13 Correct 138 ms 22212 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 72 ms 8308 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 34 ms 5852 KB Output is correct
21 Correct 136 ms 22092 KB Output is correct
22 Correct 144 ms 22060 KB Output is correct
23 Correct 140 ms 22056 KB Output is correct
24 Correct 136 ms 22048 KB Output is correct
25 Correct 58 ms 8204 KB Output is correct
26 Correct 57 ms 8316 KB Output is correct
27 Correct 140 ms 22092 KB Output is correct
28 Correct 136 ms 22088 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 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 -