Submission #300475

# Submission time Handle Problem Language Result Execution time Memory
300475 2020-09-17T07:53:17 Z davitmarg Connecting Supertrees (IOI20_supertrees) C++17
0 / 100
1 ms 256 KB
/*
DavitMarg
In a honky-tonk,
Down in Mexico
*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <queue>
#include <iomanip>
#include <bitset>
#include <stack>
#include <cassert>
#include <iterator>
#include <fstream>
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(), v.end()
#define fastIO ios::sync_with_stdio(false); cin.tie(0)
using namespace std;
const int N = 1005;

#include "supertrees.h"

#ifdef death

void build(vector<vector<int>> b)
{
    for (int i = 0; i < b.size(); i++)
    {
        for (int j = 0; j < b.size(); j++)
            cout << b[i][j] << " ";
        cout << endl;
    }
}

#endif

int parent[N];

void init(int n)
{
    for (int i = 1; i <= n; i++)
        parent[i] = i;
}

int par(int v)
{
    if (v == parent[v])
        return v;
    return parent[v] = par(parent[v]);
}

void dsu(int a, int b)
{
    a = par(a);
    b = par(b);
    if (a == b)
        return;
    parent[b] = a;
}

int n,z;
vector<vector<int>> ans,p;

void add(int a, int b)
{
    ans[a][b] = ans[b][a] = 1;
}

void solve(vector<int> v)
{
    init(v.size());
    for (int i = 0; i < v.size(); i++)
        for (int j = i + 1; j < v.size(); j++)
            if (p[v[i]][v[j]] == 1)
                dsu(i, j);

    for (int i = 0; i < v.size(); i++)
        for (int j = i + 1; j < v.size(); j++)
            if (z || (p[v[i]][v[j]] == 2 && par(i) == par(j)))
            {
                z = 1;
                return;
            }
    map<int, vector<int>> VS;
    vector<int> V;
    for (int i = 0; i < v.size(); i++)
        VS[v[par(i)]].PB(v[i]);

    for (auto it = VS.begin(); it != VS.end(); ++it)
    {
        for (int i = 0; i < it->second.size() - 1; i++)
            add(it->second[i], it->second[i + 1]);
        V.push_back(it->first);
    }

    for (int i = 0; i < V.size(); i++)
        add(V[i], V[(i + 1) % V.size()]);
}

int construct(vector<vector<int>> P)
{
    p = P;
    n = p.size();
    ans.resize(n, vector<int>(n));
    for (int i = 0; i < n; i++)
        for (int j = i + 1; j < n; j++)
            if (p[i][j])
            {
                dsu(i, j);
                if (p[i][j] == 3)
                {
                    build(ans);
                    return 0;
                }
            }

    map<int, vector<int>> vs;
    for (int i = 0; i < n; i++)
    {
        for (int j = i + 1; j < n; j++)
            if (p[i][j] == 0 && par(i) == par(j))
            {
                build(ans);
                return 0;
            }
        vs[par(i)].push_back(i);
    }


    for (auto it = vs.begin(); it != vs.end(); ++it)
        solve(it->second);
    if (z)
    {
        build(ans);
        return 0;
    }
    build(ans);
    return 1;
}

#ifdef death
int main()
{
    fastIO;
    vector<vector<int>> P(4);
    P[0].PB(1);P[0].PB(1);P[0].PB(2);P[0].PB(2);
    P[1].PB(1);P[1].PB(1);P[1].PB(2);P[1].PB(2);
    P[2].PB(2);P[2].PB(2);P[2].PB(1);P[2].PB(2);
    P[3].PB(2);P[3].PB(2);P[3].PB(2);P[3].PB(1);
    cout << construct(P) << endl;
    
    return 0;
}
#endif
/*



*/

Compilation message

supertrees.cpp: In function 'void solve(std::vector<int>)':
supertrees.cpp:84:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |     for (int i = 0; i < v.size(); i++)
      |                     ~~^~~~~~~~~~
supertrees.cpp:85:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |         for (int j = i + 1; j < v.size(); j++)
      |                             ~~^~~~~~~~~~
supertrees.cpp:89:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |     for (int i = 0; i < v.size(); i++)
      |                     ~~^~~~~~~~~~
supertrees.cpp:90:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |         for (int j = i + 1; j < v.size(); j++)
      |                             ~~^~~~~~~~~~
supertrees.cpp:98:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |     for (int i = 0; i < v.size(); i++)
      |                     ~~^~~~~~~~~~
supertrees.cpp:103:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |         for (int i = 0; i < it->second.size() - 1; i++)
      |                         ~~^~~~~~~~~~~~~~~~~~~~~~~
supertrees.cpp:108:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |     for (int i = 0; i < V.size(); i++)
      |                     ~~^~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB WA in grader: construct called build but returned 0
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB WA in grader: construct called build but returned 0
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 256 KB b[0][0] is not 0
2 Halted 0 ms 0 KB -