oj.uz

Submission #1066161

# Submission time Handle Problem Language Result Execution time Memory
1066161 2024-08-19T15:53:34 Z kkkkkkkk Connecting Supertrees (IOI20_supertrees) C++14
46 / 100
 155 ms 24400 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]==3) return 0;
            else 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 (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]==2&&Find2(x)==Find2(y)) return 0;
            }
        }
        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:56:23: 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();j++) {
      |                      ~^~~~~~~~~~~~~
supertrees.cpp:58:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |             for (int k=j+1;k<gr[i].size();k++) {
      |                            ~^~~~~~~~~~~~~
supertrees.cpp:63:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |         for (int j=0;j<gr[i].size();j++) {
      |                      ~^~~~~~~~~~~~~
supertrees.cpp:65:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |             for (int k=j+1;k<gr[i].size();k++) {
      |                            ~^~~~~~~~~~~~~
supertrees.cpp:77:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   77 |         for (int j=0;j<roots.size()-1;j++)
      |                      ~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1192 KB Output is correct
7 Correct 122 ms 24060 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1192 KB Output is correct
7 Correct 122 ms 24060 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 440 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 1368 KB Output is correct
13 Correct 127 ms 24156 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 #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 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 7 ms 1372 KB Output is correct
9 Correct 113 ms 23836 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 6 ms 1368 KB Output is correct
13 Correct 122 ms 24076 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 #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 30 ms 6380 KB Output is correct
5 Correct 122 ms 24144 KB Output is correct
6 Correct 115 ms 24148 KB Output is correct
7 Correct 155 ms 24148 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 31 ms 6236 KB Output is correct
10 Correct 121 ms 24400 KB Output is correct
11 Correct 115 ms 24084 KB Output is correct
12 Correct 121 ms 23968 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 436 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 31 ms 6276 KB Output is correct
17 Correct 122 ms 24148 KB Output is correct
18 Correct 121 ms 24188 KB Output is correct
19 Correct 126 ms 24148 KB Output is correct
20 Correct 113 ms 24056 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1192 KB Output is correct
7 Correct 122 ms 24060 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 440 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 1368 KB Output is correct
13 Correct 127 ms 24156 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 #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1192 KB Output is correct
7 Correct 122 ms 24060 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 440 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 1368 KB Output is correct
13 Correct 127 ms 24156 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -