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Submission #1065037

# Submission time Handle Problem Language Result Execution time Memory
1065037 2024-08-18T21:31:12 Z kkkkkkkk Connecting Supertrees (IOI20_supertrees) C++14
21 / 100
 158 ms 24144 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

int parent[1005], sz[1005];

int Find(int x) {
    if (x==parent[x])
        return x;
    return parent[x]=Find(parent[x]);
}

void Union(int a, int b) {
    a=Find(a), b=Find(b);
    if (a==b) return;
    if (sz[a]<sz[b])
        swap(a, b);
    sz[a]+=sz[b];
    parent[b]=a;
}

int construct(vector<vector<int> > paths) {
    int n=paths.size();
    vector<vector<int> > a=paths;
    for (int i=0;i<n;i++)
        sz[i]=1, parent[i]=i;
    for (int i=0;i<n;i++)
        for (int j=0;j<n;j++)
            a[i][j]=0;
    bool vtor_subtask=true;
    for (int i=0;i<n;i++) {
        for (int j=i+1;j<n;j++) {
            if (paths[i][j]) Union(i, j);
            if (paths[i][j]==2) vtor_subtask=false;
        }
    }
    vector<int> gr[n];
    for (int i=0;i<n;i++) {
        int lider=Find(i);
        gr[lider].push_back(i);
    }
    for (int i=0;i<n;i++) {
        if (gr[i].size()) {
            for (auto x:gr[i])
                for (auto y:gr[i])
                    if (!paths[x][y])
                        return 0;
            if (vtor_subtask) {
                int x=gr[i][0];
                for (auto y:gr[i])
                    if (x!=y) a[x][y]=1, a[y][x]=1;
            }
            else {
                int x=gr[i][0], y=gr[i][gr[i].size()-1];
                for (int j=0;j<gr[i].size()-1;j++)
                    a[gr[i][j]][gr[i][j+1]]=1, a[gr[i][j+1]][gr[i][j]]=1;
                a[x][y]=1, a[y][x]=1;
            }
        }
    }
    build(a);
    return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:56:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |                 for (int j=0;j<gr[i].size()-1;j++)
      |                              ~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# 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 0 ms 344 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 116 ms 22024 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 0 ms 344 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 116 ms 22024 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 1116 KB Output is correct
13 Correct 118 ms 22044 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 76 ms 12056 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 61 ms 5712 KB Output is correct
21 Correct 158 ms 22100 KB Output is correct
22 Correct 142 ms 22044 KB Output is correct
23 Correct 125 ms 22048 KB Output is correct
24 Correct 116 ms 22100 KB Output is correct
25 Correct 50 ms 12060 KB Output is correct
26 Correct 50 ms 12056 KB Output is correct
27 Correct 122 ms 22124 KB Output is correct
28 Correct 115 ms 22100 KB Output is correct

Subtask #3
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 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

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 344 KB Output is correct
4 Correct 30 ms 6412 KB Output is correct
5 Correct 120 ms 23996 KB Output is correct
6 Correct 119 ms 24144 KB Output is correct
7 Correct 155 ms 24144 KB Output is correct
8 Incorrect 0 ms 348 KB b[4][4] is not 0
9 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 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 0 ms 344 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 116 ms 22024 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 1116 KB Output is correct
13 Correct 118 ms 22044 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 76 ms 12056 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 61 ms 5712 KB Output is correct
21 Correct 158 ms 22100 KB Output is correct
22 Correct 142 ms 22044 KB Output is correct
23 Correct 125 ms 22048 KB Output is correct
24 Correct 116 ms 22100 KB Output is correct
25 Correct 50 ms 12060 KB Output is correct
26 Correct 50 ms 12056 KB Output is correct
27 Correct 122 ms 22124 KB Output is correct
28 Correct 115 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 Incorrect 0 ms 348 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 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 344 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 116 ms 22024 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 1116 KB Output is correct
13 Correct 118 ms 22044 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 76 ms 12056 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 61 ms 5712 KB Output is correct
21 Correct 158 ms 22100 KB Output is correct
22 Correct 142 ms 22044 KB Output is correct
23 Correct 125 ms 22048 KB Output is correct
24 Correct 116 ms 22100 KB Output is correct
25 Correct 50 ms 12060 KB Output is correct
26 Correct 50 ms 12056 KB Output is correct
27 Correct 122 ms 22124 KB Output is correct
28 Correct 115 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 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -