oj.uz

Submission #1066146

# Submission time Handle Problem Language Result Execution time Memory
1066146 2024-08-19T15:28:07 Z kkkkkkkk Connecting Supertrees (IOI20_supertrees) C++14
46 / 100
 123 ms 24148 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

int parent[1005], sz[1005], parent2[1005], sz2[1005];

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

int Find2(int x) {
    if (x==parent2[x])
        return x;
    return parent2[x]=Find2(parent2[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;
}

void Union2(int a, int b) {
    a=Find2(a), b=Find2(b);
    if (a==b) return;
    if (sz2[a]<sz2[b])
        swap(a, b);
    sz2[a]+=sz2[b];
    parent2[b]=a;
}

int construct(vector<vector<int> > paths) {
    int n=paths.size();
    vector<vector<int> > a(n, vector<int> (n, 0));
    for (int i=0;i<n;i++)
        sz[i]=1, parent[i]=i, sz2[i]=1, parent2[i]=i;
    for (int i=0;i<n;i++)
        for (int j=i+1;j<n;j++)
            if (paths[i][j]) Union(i, j);
    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()) continue;
        vector<int> roots;
        for (int j=0;j<gr[i].size();j++) {
            int x=gr[i][j];
            for (int k=j+1;k<gr[i].size();k++) {
                int y=gr[i][k];
                if (paths[x][y]==1) Union2(x, y);
            }
        }
        for (auto x:gr[i]) {
            if (Find2(x)==x) roots.push_back(x);
            else a[x][parent2[x]]=1, a[parent2[x]][x]=1;
        }
        if (roots.size()<=1) continue;
        if (roots.size()==2) return 0;
        int x=roots[0], y=roots[roots.size()-1];
        for (int j=0;j<roots.size()-1;j++)
            a[roots[j]][roots[j+1]]=1, a[roots[j+1]][roots[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:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |         for (int j=0;j<gr[i].size();j++) {
      |                      ~^~~~~~~~~~~~~
supertrees.cpp:56:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |             for (int k=j+1;k<gr[i].size();k++) {
      |                            ~^~~~~~~~~~~~~
supertrees.cpp:68:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |         for (int j=0;j<roots.size()-1;j++)
      |                      ~^~~~~~~~~~~~~~~

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 436 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 123 ms 23948 KB Output is correct

Subtask #2
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 436 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 123 ms 23948 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 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 1372 KB Output is correct
13 Correct 113 ms 23960 KB Output is correct
14 Incorrect 0 ms 344 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #3
0 / 19.0

# 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 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 5 ms 1200 KB Output is correct
9 Correct 114 ms 24060 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 1372 KB Output is correct
13 Correct 117 ms 24144 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #4
35.0 / 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 29 ms 6176 KB Output is correct
5 Correct 117 ms 24104 KB Output is correct
6 Correct 118 ms 24148 KB Output is correct
7 Correct 121 ms 24144 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 41 ms 6220 KB Output is correct
10 Correct 122 ms 24148 KB Output is correct
11 Correct 114 ms 24056 KB Output is correct
12 Correct 121 ms 24148 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 30 ms 6380 KB Output is correct
17 Correct 114 ms 24144 KB Output is correct
18 Correct 118 ms 24148 KB Output is correct
19 Correct 116 ms 23952 KB Output is correct
20 Correct 119 ms 23952 KB Output is correct

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 436 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 123 ms 23948 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 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 1372 KB Output is correct
13 Correct 113 ms 23960 KB Output is correct
14 Incorrect 0 ms 344 KB Answer gives possible 1 while actual possible 0
15 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 436 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 123 ms 23948 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 344 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 1372 KB Output is correct
13 Correct 113 ms 23960 KB Output is correct
14 Incorrect 0 ms 344 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -