#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
map<pair<int, int>, int> M, M2;
vector<int> adj[200000];
bool counting[200000];
vector<pair<int, int>> E;
int link[200002];
int _find(int x)
{
if(x == link[x]) return x;
return link[x] = _find(link[x]);
}
void _unite(int x, int y)
{
x = _find(x); y = _find(y);
link[x] = y;
}
int cnt = 0;
void count_fountains(int x)
{
cnt++;
counting[x] = true;
for(int i : adj[x])
{
if(counting[i]) continue;
count_fountains(i);
E.push_back({x, i});
}
}
int construct_roads(vector<int> x, vector<int> y) {
if (x.size() == 1) {
build({}, {}, {}, {});
return 1;
}
int n = x.size();
vector<int> u, v, a, b;
int MAX = 0;
for(int i=0;i<n;i++) MAX = max(MAX, x[i]);
for(int i=0;i<n;i++)
M[{x[i], y[i]}] = i+1;
for(int i=0;i<n;i++)
{
if(M[{x[i]+2, y[i]}]) adj[i].push_back(M[{x[i]+2, y[i]}]-1);
if(M[{x[i]-2, y[i]}]) adj[i].push_back(M[{x[i]-2, y[i]}]-1);
if(M[{x[i], y[i]+2}]) adj[i].push_back(M[{x[i], y[i]+2}]-1);
if(M[{x[i], y[i]-2}]) adj[i].push_back(M[{x[i], y[i]-2}]-1);
}
count_fountains(0);
if(cnt < n) return 0;
if(MAX <= 6)
{
for(int i=0;i<n;i++) link[i] = i;
for(int i=0;i<n;i++)
{
for(int j : adj[i])
{
if(y[i] < y[j])
{
u.push_back(i);
v.push_back(j);
b.push_back(y[i] + 1);
if(x[i] == 2 || (x[i] == 4 && y[i]%4 == 0))
{
a.push_back(x[i] - 1);
M2[{x[i]-1,y[i]+1}] = 1;
}
else
{
a.push_back(x[i] + 1);
M2[{x[i]+1, y[i]+1}] = 1;
}
_unite(i, j);
}
}
}
for(int i=0;i<n;i++)
{
for(int j : adj[i])
{
if(_find(i) == _find(j)) continue;
if(x[i] > x[j]) swap(i, j);
u.push_back(i);
v.push_back(j);
a.push_back(x[i] + 1);
if(M2[{x[i] + 1, y[i] + 1}]) b.push_back(y[i] - 1);
else b.push_back(y[i] + 1);
_unite(i, j);
}
}
return 1;
}
for(auto U : E)
{
int i = U.first, j = U.second;
if(x[i] == x[j]) continue;
if(x[i] > x[j]) swap(i, j);
u.push_back(i);
v.push_back(j);
a.push_back(x[i]+1);
if((x[i]+y[i])%4 == 0)
{
b.push_back(y[i]+1);
M2[{x[i]+1, y[i]+1}] = 1;
}
else
{
b.push_back(y[i]-1);
M2[{x[i]+1, y[i]-1}] = 1;
}
}
for(auto U : E)
{
int i = U.first, j = U.second;
if(x[i] != x[j]) continue;
if(y[i] > y[j]) swap(i, j);
u.push_back(i);
v.push_back(j);
b.push_back(y[i]+1);
if(M2[{x[i]+1, y[i]+1}]) a.push_back(x[i]-1);
else a.push_back(x[i]+1);
}
build(u, v, a, b);
return 1;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4940 KB |
Output is correct |
2 |
Incorrect |
3 ms |
4940 KB |
Wrong answer detected in grader |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4940 KB |
Output is correct |
2 |
Incorrect |
3 ms |
4940 KB |
Wrong answer detected in grader |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4940 KB |
Output is correct |
2 |
Incorrect |
3 ms |
4940 KB |
Wrong answer detected in grader |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4940 KB |
Output is correct |
2 |
Incorrect |
3 ms |
4940 KB |
Wrong answer detected in grader |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4940 KB |
Output is correct |
2 |
Incorrect |
3 ms |
4940 KB |
Wrong answer detected in grader |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
4940 KB |
Output is correct |
2 |
Incorrect |
3 ms |
4940 KB |
Wrong answer detected in grader |
3 |
Halted |
0 ms |
0 KB |
- |