| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 300488 | davitmarg | Connecting Supertrees (IOI20_supertrees) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/*
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;
#ifndef death
#include "supertrees.h"
#endif
#ifdef death
void build(vector<vector<bool>> 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<bool>> ans,zr;
vector<vector<int>> 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 (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<bool>(n,0));
zr.resize(n, vector<bool>(n,0));
//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(zr);
// 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(zr);
// return 0;
// }
// vs[par(i)].push_back(i);
//}
//for (auto it = vs.begin(); it != vs.end(); ++it)
// solve(it->second);
if (z || 1)
{
build(zr);
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
/*
*/