#include "parks.h"
#include<bits/stdc++.h>
#define f first
#define s second
#define ii pair<int,int>
using namespace std;
#define maxn 200010
#define db(x) cerr<<#x<<": "<<(x)<<"\n";
int mx[4] = { 0 , 2 , 0 , -2 };
int my[4] = { 2 , 0 , -2 , 0 };
int vis[maxn];
ii arr[maxn];
map<ii,int> mk;
vector<int> U, V, A, B;
map<ii,int> mp;
bool add_edge(int u,int v,int plus_){
U.push_back(u);
V.push_back(v);
if( arr[u].f != arr[v].f ){
if( mk[{(arr[u].f+arr[v].f)/2,arr[u].s + plus_}] ) return false;
A.push_back( (arr[u].f+arr[v].f)/2 );
B.push_back( arr[u].s + plus_ );
mk[{(arr[u].f+arr[v].f)/2,arr[u].s + plus_}] = true;
}
else{
if( mk[{arr[u].f + plus_,(arr[u].s+arr[v].s)/2}] ) return false;
A.push_back( arr[u].f + plus_ );
B.push_back( (arr[u].s+arr[v].s)/2 );
mk[{arr[u].f + plus_,(arr[u].s+arr[v].s)/2}] = true;
}
return true;
}
void dfs(int u,int p,int plus_){
vis[u] = 1;
for(int i=0; i<4; i++){
int nx = arr[u].f + mx[i];
int ny = arr[u].s + my[i];
if( mp[{nx,ny}] ){
int v = mp[{nx,ny}] - 1;
if( vis[v] ) continue;
int gp = p / 2 * 2 + ( p + 1 ) % 2;
int nplus = plus_;
if( i != gp ) nplus *= -1;
if( add_edge(u,v,nplus) )
dfs(v,i,nplus);
}
}
}
int construct_roads(std::vector<int> x, std::vector<int> y) {
// if (x.size() == 1) {
// vector<int> pra;
// build(pra, pra, pra, pra);
// return 1;
// }
int n = x.size();
pair<ii,int> st = { { 2000000007 , 2000000007 } , -1 };
for(int i=0; i<n; i++){
arr[i] = {x[i],y[i]};
mp[{x[i],y[i]}] = i + 1;
st = min( st , { arr[i] , i } );
}
int u = st.s;
vis[u] = 1;
for(int i=0; i<4; i++){
int nx = arr[u].f + mx[i];
int ny = arr[u].s + my[i];
if( mp[{nx,ny}] ){
int v = mp[{nx,ny}] - 1;
if( vis[v] ) continue;
int plus_ = ( i == 1 ) + ( i == 2 ) - ( i == 0 ) - ( i == 3 );
if( add_edge(u,v,plus_) )
dfs(v,i,plus_);
}
}
for(int i=0; i<n; i++)
if( vis[i] == 0 )
return 0;
build(U, V, A, B);
return 1;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
204 KB |
Output is correct |
8 |
Correct |
1 ms |
268 KB |
Output is correct |
9 |
Correct |
292 ms |
45400 KB |
Output is correct |
10 |
Correct |
24 ms |
4940 KB |
Output is correct |
11 |
Correct |
146 ms |
24568 KB |
Output is correct |
12 |
Correct |
34 ms |
7292 KB |
Output is correct |
13 |
Correct |
70 ms |
14188 KB |
Output is correct |
14 |
Correct |
1 ms |
460 KB |
Output is correct |
15 |
Correct |
2 ms |
588 KB |
Output is correct |
16 |
Correct |
294 ms |
45312 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
204 KB |
Output is correct |
8 |
Correct |
1 ms |
268 KB |
Output is correct |
9 |
Correct |
292 ms |
45400 KB |
Output is correct |
10 |
Correct |
24 ms |
4940 KB |
Output is correct |
11 |
Correct |
146 ms |
24568 KB |
Output is correct |
12 |
Correct |
34 ms |
7292 KB |
Output is correct |
13 |
Correct |
70 ms |
14188 KB |
Output is correct |
14 |
Correct |
1 ms |
460 KB |
Output is correct |
15 |
Correct |
2 ms |
588 KB |
Output is correct |
16 |
Correct |
294 ms |
45312 KB |
Output is correct |
17 |
Correct |
1 ms |
204 KB |
Output is correct |
18 |
Correct |
1 ms |
204 KB |
Output is correct |
19 |
Incorrect |
1 ms |
204 KB |
Wrong answer detected in grader |
20 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
204 KB |
Output is correct |
8 |
Correct |
1 ms |
268 KB |
Output is correct |
9 |
Correct |
292 ms |
45400 KB |
Output is correct |
10 |
Correct |
24 ms |
4940 KB |
Output is correct |
11 |
Correct |
146 ms |
24568 KB |
Output is correct |
12 |
Correct |
34 ms |
7292 KB |
Output is correct |
13 |
Correct |
70 ms |
14188 KB |
Output is correct |
14 |
Correct |
1 ms |
460 KB |
Output is correct |
15 |
Correct |
2 ms |
588 KB |
Output is correct |
16 |
Correct |
294 ms |
45312 KB |
Output is correct |
17 |
Correct |
1 ms |
204 KB |
Output is correct |
18 |
Correct |
1 ms |
204 KB |
Output is correct |
19 |
Incorrect |
1 ms |
204 KB |
Wrong answer detected in grader |
20 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
204 KB |
Output is correct |
8 |
Correct |
1 ms |
268 KB |
Output is correct |
9 |
Correct |
292 ms |
45400 KB |
Output is correct |
10 |
Correct |
24 ms |
4940 KB |
Output is correct |
11 |
Correct |
146 ms |
24568 KB |
Output is correct |
12 |
Correct |
34 ms |
7292 KB |
Output is correct |
13 |
Correct |
70 ms |
14188 KB |
Output is correct |
14 |
Correct |
1 ms |
460 KB |
Output is correct |
15 |
Correct |
2 ms |
588 KB |
Output is correct |
16 |
Correct |
294 ms |
45312 KB |
Output is correct |
17 |
Correct |
1 ms |
204 KB |
Output is correct |
18 |
Correct |
1 ms |
204 KB |
Output is correct |
19 |
Correct |
1 ms |
204 KB |
Output is correct |
20 |
Correct |
573 ms |
78308 KB |
Output is correct |
21 |
Correct |
658 ms |
65648 KB |
Output is correct |
22 |
Correct |
670 ms |
78000 KB |
Output is correct |
23 |
Correct |
572 ms |
71928 KB |
Output is correct |
24 |
Correct |
224 ms |
17484 KB |
Output is correct |
25 |
Correct |
164 ms |
18244 KB |
Output is correct |
26 |
Correct |
203 ms |
18508 KB |
Output is correct |
27 |
Correct |
519 ms |
52964 KB |
Output is correct |
28 |
Correct |
529 ms |
53012 KB |
Output is correct |
29 |
Correct |
697 ms |
52892 KB |
Output is correct |
30 |
Correct |
733 ms |
53064 KB |
Output is correct |
31 |
Correct |
1 ms |
204 KB |
Output is correct |
32 |
Correct |
38 ms |
5068 KB |
Output is correct |
33 |
Correct |
83 ms |
8848 KB |
Output is correct |
34 |
Correct |
557 ms |
78260 KB |
Output is correct |
35 |
Correct |
12 ms |
1868 KB |
Output is correct |
36 |
Correct |
49 ms |
6128 KB |
Output is correct |
37 |
Correct |
105 ms |
10556 KB |
Output is correct |
38 |
Correct |
208 ms |
19916 KB |
Output is correct |
39 |
Correct |
323 ms |
27084 KB |
Output is correct |
40 |
Correct |
400 ms |
34496 KB |
Output is correct |
41 |
Correct |
515 ms |
41860 KB |
Output is correct |
42 |
Correct |
568 ms |
49220 KB |
Output is correct |
43 |
Correct |
0 ms |
204 KB |
Output is correct |
44 |
Correct |
1 ms |
204 KB |
Output is correct |
45 |
Correct |
1 ms |
204 KB |
Output is correct |
46 |
Correct |
1 ms |
204 KB |
Output is correct |
47 |
Correct |
1 ms |
204 KB |
Output is correct |
48 |
Correct |
0 ms |
204 KB |
Output is correct |
49 |
Correct |
1 ms |
204 KB |
Output is correct |
50 |
Correct |
1 ms |
204 KB |
Output is correct |
51 |
Correct |
0 ms |
204 KB |
Output is correct |
52 |
Correct |
1 ms |
204 KB |
Output is correct |
53 |
Correct |
1 ms |
204 KB |
Output is correct |
54 |
Correct |
2 ms |
716 KB |
Output is correct |
55 |
Correct |
2 ms |
716 KB |
Output is correct |
56 |
Correct |
270 ms |
38940 KB |
Output is correct |
57 |
Correct |
436 ms |
56216 KB |
Output is correct |
58 |
Correct |
430 ms |
56132 KB |
Output is correct |
59 |
Correct |
1 ms |
204 KB |
Output is correct |
60 |
Correct |
1 ms |
204 KB |
Output is correct |
61 |
Correct |
1 ms |
204 KB |
Output is correct |
62 |
Correct |
649 ms |
84168 KB |
Output is correct |
63 |
Correct |
626 ms |
71500 KB |
Output is correct |
64 |
Correct |
666 ms |
77428 KB |
Output is correct |
65 |
Correct |
4 ms |
1100 KB |
Output is correct |
66 |
Correct |
7 ms |
1404 KB |
Output is correct |
67 |
Correct |
264 ms |
34900 KB |
Output is correct |
68 |
Correct |
498 ms |
52288 KB |
Output is correct |
69 |
Correct |
625 ms |
69772 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
204 KB |
Output is correct |
8 |
Correct |
1 ms |
268 KB |
Output is correct |
9 |
Correct |
292 ms |
45400 KB |
Output is correct |
10 |
Correct |
24 ms |
4940 KB |
Output is correct |
11 |
Correct |
146 ms |
24568 KB |
Output is correct |
12 |
Correct |
34 ms |
7292 KB |
Output is correct |
13 |
Correct |
70 ms |
14188 KB |
Output is correct |
14 |
Correct |
1 ms |
460 KB |
Output is correct |
15 |
Correct |
2 ms |
588 KB |
Output is correct |
16 |
Correct |
294 ms |
45312 KB |
Output is correct |
17 |
Correct |
667 ms |
90296 KB |
Output is correct |
18 |
Correct |
641 ms |
84312 KB |
Output is correct |
19 |
Correct |
628 ms |
78140 KB |
Output is correct |
20 |
Correct |
525 ms |
59984 KB |
Output is correct |
21 |
Correct |
516 ms |
62184 KB |
Output is correct |
22 |
Correct |
1 ms |
204 KB |
Output is correct |
23 |
Correct |
73 ms |
9408 KB |
Output is correct |
24 |
Correct |
26 ms |
3864 KB |
Output is correct |
25 |
Correct |
66 ms |
8656 KB |
Output is correct |
26 |
Correct |
108 ms |
13344 KB |
Output is correct |
27 |
Correct |
354 ms |
30832 KB |
Output is correct |
28 |
Correct |
350 ms |
38624 KB |
Output is correct |
29 |
Correct |
501 ms |
46332 KB |
Output is correct |
30 |
Correct |
517 ms |
53928 KB |
Output is correct |
31 |
Correct |
629 ms |
61840 KB |
Output is correct |
32 |
Correct |
626 ms |
72776 KB |
Output is correct |
33 |
Correct |
592 ms |
84040 KB |
Output is correct |
34 |
Correct |
5 ms |
1228 KB |
Output is correct |
35 |
Correct |
7 ms |
1496 KB |
Output is correct |
36 |
Correct |
271 ms |
33492 KB |
Output is correct |
37 |
Correct |
477 ms |
50500 KB |
Output is correct |
38 |
Correct |
670 ms |
66760 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
204 KB |
Output is correct |
2 |
Correct |
1 ms |
204 KB |
Output is correct |
3 |
Correct |
1 ms |
204 KB |
Output is correct |
4 |
Correct |
0 ms |
204 KB |
Output is correct |
5 |
Correct |
0 ms |
204 KB |
Output is correct |
6 |
Correct |
1 ms |
204 KB |
Output is correct |
7 |
Correct |
1 ms |
204 KB |
Output is correct |
8 |
Correct |
1 ms |
268 KB |
Output is correct |
9 |
Correct |
292 ms |
45400 KB |
Output is correct |
10 |
Correct |
24 ms |
4940 KB |
Output is correct |
11 |
Correct |
146 ms |
24568 KB |
Output is correct |
12 |
Correct |
34 ms |
7292 KB |
Output is correct |
13 |
Correct |
70 ms |
14188 KB |
Output is correct |
14 |
Correct |
1 ms |
460 KB |
Output is correct |
15 |
Correct |
2 ms |
588 KB |
Output is correct |
16 |
Correct |
294 ms |
45312 KB |
Output is correct |
17 |
Correct |
1 ms |
204 KB |
Output is correct |
18 |
Correct |
1 ms |
204 KB |
Output is correct |
19 |
Incorrect |
1 ms |
204 KB |
Wrong answer detected in grader |
20 |
Halted |
0 ms |
0 KB |
- |