oj.uz

Submission #435730

# Submission time Handle Problem Language Result Execution time Memory
435730 2021-06-23T15:55:09 Z DanerZein Fountain Parks (IOI21_parks) C++17
15 / 100
 359 ms 48644 KB 
#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;
typedef vector<ii> vi;
const int MAX_N=2e5+10;
vector<vi> ox(MAX_N),oy(MAX_N);
int pa[MAX_N],tam[MAX_N];
void init(int n){
  for(int i=0;i<n;i++){
    pa[i]=i; tam[i]=1;
  }
}
int findset(int i){
  if(pa[i]==i) return i;
  return pa[i]=findset(pa[i]);
}
bool issameset(int i,int j){
  return findset(i)==findset(j);
}
void unionset(int i,int j){
  if(!issameset(i,j)){
    int u=findset(i),v=findset(j);
    pa[u]=v;
    tam[v]+=tam[u];
  }
}
int construct_roads(std::vector<int> x, std::vector<int> y) {
  int n=x.size();
  for(int i=0;i<n;i++){
    ox[x[i]].push_back(ii(y[i],i));
    oy[y[i]].push_back(ii(x[i],i));
  }
  for(int i=0;i<MAX_N;i++){
    sort(ox[i].begin(),ox[i].end());
    sort(oy[i].begin(),oy[i].end());
  }
  vector<int> ru,rv,ra,rb;
  set<ii> ba;
  init(n);
  for(int i=2;i<MAX_N;i+=2){
    int t=oy[i].size();
    for(int j=0;j<t-1;j++){
      int xi=oy[i][j].first,xj=oy[i][j+1].first;
      int u=oy[i][j].second,v=oy[i][j+1].second;
      if(xj-xi==2 && !issameset(u,v)){
	ru.push_back(oy[i][j].second);
	rv.push_back(oy[i][j+1].second);
	unionset(u,v);
	int xk=oy[i][j+2].first;
	auto it=lower_bound(oy[i-2].begin(),oy[i-2].end(),ii(xj,-1));
	if(j+2<t && oy[i][j+2].first-xj==2 && it!=oy[i-2].end() && (*it).first==xj){
	  ra.push_back(xi+1); rb.push_back(i+1);
	  ba.insert(ii(xi+1,i+1));
	  it=lower_bound(oy[i+2].begin(),oy[i+2].end(),ii(xi,-1));
	  int id=it-oy[i+2].begin();
	  if(it!=oy[i+2].end() && (*it).first==xi && id-1>=0 && oy[i+2][id].first-oy[i+2][id-1].first==2){
	    int uu=oy[i+2][id].second,vv=oy[i+2][id-1].second;
	    unionset(uu,vv);
	    ru.push_back(uu); rv.push_back(vv);
	    ra.push_back(xi-1); rb.push_back(i+3);
	  }
	}
	else{
	  ra.push_back(xi+1); rb.push_back(i-1);
	  ba.insert(ii(xi+1,i-1));
	}
      }
    }
  }
  for(int i=2;i<MAX_N;i+=2){
    int t=ox[i].size();
    for(int j=0;j<t-1;j++){
      int yi=ox[i][j].first,yj=ox[i][j+1].first;
      int u=ox[i][j].second,v=ox[i][j+1].second;
      if(yj-yi==2){
	ru.push_back(u); rv.push_back(v);
	unionset(u,v);
	if(ba.find(ii(i-1,yi+1))!=ba.end()){
	  ra.push_back(i+1); rb.push_back(yi+1);
	  ba.insert(ii(i+1,yi+1));
	}
	else{
	  ra.push_back(i-1); rb.push_back(yi+1);
	  ba.insert(ii(i-1,yi+1));
	}
      }
    }
  }
  if(tam[findset(0)]!=n) return 0;
  build(ru,rv,ra,rb);
  return 1;
}

Compilation message

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:50:6: warning: unused variable 'xk' [-Wunused-variable]
   50 |  int xk=oy[i][j+2].first;
      |      ^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9676 KB Output is correct
2 Correct 9 ms 9676 KB Output is correct
3 Correct 8 ms 9676 KB Output is correct
4 Correct 9 ms 9704 KB Output is correct
5 Correct 9 ms 9676 KB Output is correct
6 Correct 9 ms 9700 KB Output is correct
7 Correct 10 ms 9600 KB Output is correct
8 Correct 9 ms 9704 KB Output is correct
9 Correct 139 ms 27880 KB Output is correct
10 Correct 17 ms 11596 KB Output is correct
11 Correct 65 ms 19476 KB Output is correct
12 Correct 23 ms 12492 KB Output is correct
13 Correct 37 ms 15712 KB Output is correct
14 Correct 9 ms 9804 KB Output is correct
15 Correct 12 ms 9932 KB Output is correct
16 Correct 178 ms 27256 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9676 KB Output is correct
2 Correct 9 ms 9676 KB Output is correct
3 Correct 8 ms 9676 KB Output is correct
4 Correct 9 ms 9704 KB Output is correct
5 Correct 9 ms 9676 KB Output is correct
6 Correct 9 ms 9700 KB Output is correct
7 Correct 10 ms 9600 KB Output is correct
8 Correct 9 ms 9704 KB Output is correct
9 Correct 139 ms 27880 KB Output is correct
10 Correct 17 ms 11596 KB Output is correct
11 Correct 65 ms 19476 KB Output is correct
12 Correct 23 ms 12492 KB Output is correct
13 Correct 37 ms 15712 KB Output is correct
14 Correct 9 ms 9804 KB Output is correct
15 Correct 12 ms 9932 KB Output is correct
16 Correct 178 ms 27256 KB Output is correct
17 Correct 10 ms 9676 KB Output is correct
18 Correct 8 ms 9676 KB Output is correct
19 Correct 11 ms 9676 KB Output is correct
20 Correct 9 ms 9676 KB Output is correct
21 Correct 9 ms 9676 KB Output is correct
22 Correct 8 ms 9676 KB Output is correct
23 Correct 338 ms 48472 KB Output is correct
24 Correct 8 ms 9676 KB Output is correct
25 Correct 10 ms 9972 KB Output is correct
26 Correct 10 ms 10176 KB Output is correct
27 Correct 12 ms 10188 KB Output is correct
28 Correct 126 ms 25284 KB Output is correct
29 Correct 197 ms 32936 KB Output is correct
30 Correct 272 ms 40840 KB Output is correct
31 Correct 359 ms 48644 KB Output is correct
32 Correct 8 ms 9676 KB Output is correct
33 Correct 9 ms 9676 KB Output is correct
34 Correct 9 ms 9676 KB Output is correct
35 Correct 8 ms 9676 KB Output is correct
36 Correct 10 ms 9676 KB Output is correct
37 Correct 10 ms 9704 KB Output is correct
38 Correct 9 ms 9676 KB Output is correct
39 Correct 8 ms 9676 KB Output is correct
40 Correct 8 ms 9604 KB Output is correct
41 Correct 8 ms 9676 KB Output is correct
42 Correct 9 ms 9676 KB Output is correct
43 Correct 10 ms 9932 KB Output is correct
44 Correct 12 ms 10060 KB Output is correct
45 Correct 136 ms 24596 KB Output is correct
46 Correct 199 ms 31928 KB Output is correct
47 Correct 194 ms 31916 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9676 KB Output is correct
2 Correct 9 ms 9676 KB Output is correct
3 Correct 8 ms 9676 KB Output is correct
4 Correct 9 ms 9704 KB Output is correct
5 Correct 9 ms 9676 KB Output is correct
6 Correct 9 ms 9700 KB Output is correct
7 Correct 10 ms 9600 KB Output is correct
8 Correct 9 ms 9704 KB Output is correct
9 Correct 139 ms 27880 KB Output is correct
10 Correct 17 ms 11596 KB Output is correct
11 Correct 65 ms 19476 KB Output is correct
12 Correct 23 ms 12492 KB Output is correct
13 Correct 37 ms 15712 KB Output is correct
14 Correct 9 ms 9804 KB Output is correct
15 Correct 12 ms 9932 KB Output is correct
16 Correct 178 ms 27256 KB Output is correct
17 Correct 10 ms 9676 KB Output is correct
18 Correct 8 ms 9676 KB Output is correct
19 Correct 11 ms 9676 KB Output is correct
20 Correct 9 ms 9676 KB Output is correct
21 Correct 9 ms 9676 KB Output is correct
22 Correct 8 ms 9676 KB Output is correct
23 Correct 338 ms 48472 KB Output is correct
24 Correct 8 ms 9676 KB Output is correct
25 Correct 10 ms 9972 KB Output is correct
26 Correct 10 ms 10176 KB Output is correct
27 Correct 12 ms 10188 KB Output is correct
28 Correct 126 ms 25284 KB Output is correct
29 Correct 197 ms 32936 KB Output is correct
30 Correct 272 ms 40840 KB Output is correct
31 Correct 359 ms 48644 KB Output is correct
32 Correct 8 ms 9676 KB Output is correct
33 Correct 9 ms 9676 KB Output is correct
34 Correct 9 ms 9676 KB Output is correct
35 Correct 8 ms 9676 KB Output is correct
36 Correct 10 ms 9676 KB Output is correct
37 Correct 10 ms 9704 KB Output is correct
38 Correct 9 ms 9676 KB Output is correct
39 Correct 8 ms 9676 KB Output is correct
40 Correct 8 ms 9604 KB Output is correct
41 Correct 8 ms 9676 KB Output is correct
42 Correct 9 ms 9676 KB Output is correct
43 Correct 10 ms 9932 KB Output is correct
44 Correct 12 ms 10060 KB Output is correct
45 Correct 136 ms 24596 KB Output is correct
46 Correct 199 ms 31928 KB Output is correct
47 Correct 194 ms 31916 KB Output is correct
48 Correct 9 ms 9700 KB Output is correct
49 Correct 9 ms 9676 KB Output is correct
50 Correct 9 ms 9676 KB Output is correct
51 Incorrect 11 ms 9676 KB Tree @(5, 5) appears more than once: for edges on positions 3 and 6
52 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9676 KB Output is correct
2 Correct 9 ms 9676 KB Output is correct
3 Correct 8 ms 9676 KB Output is correct
4 Correct 9 ms 9704 KB Output is correct
5 Correct 9 ms 9676 KB Output is correct
6 Correct 9 ms 9700 KB Output is correct
7 Correct 10 ms 9600 KB Output is correct
8 Correct 9 ms 9704 KB Output is correct
9 Correct 139 ms 27880 KB Output is correct
10 Correct 17 ms 11596 KB Output is correct
11 Correct 65 ms 19476 KB Output is correct
12 Correct 23 ms 12492 KB Output is correct
13 Correct 37 ms 15712 KB Output is correct
14 Correct 9 ms 9804 KB Output is correct
15 Correct 12 ms 9932 KB Output is correct
16 Correct 178 ms 27256 KB Output is correct
17 Correct 9 ms 9708 KB Output is correct
18 Correct 10 ms 9676 KB Output is correct
19 Correct 10 ms 9676 KB Output is correct
20 Correct 349 ms 39408 KB Output is correct
21 Correct 310 ms 39108 KB Output is correct
22 Correct 288 ms 38424 KB Output is correct
23 Correct 216 ms 34816 KB Output is correct
24 Correct 85 ms 18296 KB Output is correct
25 Correct 140 ms 30488 KB Output is correct
26 Correct 189 ms 30424 KB Output is correct
27 Correct 220 ms 36760 KB Output is correct
28 Correct 223 ms 36844 KB Output is correct
29 Correct 210 ms 36760 KB Output is correct
30 Correct 210 ms 36808 KB Output is correct
31 Correct 9 ms 9676 KB Output is correct
32 Incorrect 24 ms 12040 KB Tree @(185703, 20399) appears more than once: for edges on positions 1266 and 7203
33 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9676 KB Output is correct
2 Correct 9 ms 9676 KB Output is correct
3 Correct 8 ms 9676 KB Output is correct
4 Correct 9 ms 9704 KB Output is correct
5 Correct 9 ms 9676 KB Output is correct
6 Correct 9 ms 9700 KB Output is correct
7 Correct 10 ms 9600 KB Output is correct
8 Correct 9 ms 9704 KB Output is correct
9 Correct 139 ms 27880 KB Output is correct
10 Correct 17 ms 11596 KB Output is correct
11 Correct 65 ms 19476 KB Output is correct
12 Correct 23 ms 12492 KB Output is correct
13 Correct 37 ms 15712 KB Output is correct
14 Correct 9 ms 9804 KB Output is correct
15 Correct 12 ms 9932 KB Output is correct
16 Correct 178 ms 27256 KB Output is correct
17 Correct 269 ms 38484 KB Output is correct
18 Correct 262 ms 38500 KB Output is correct
19 Incorrect 295 ms 38808 KB Tree @(49999, 7) appears more than once: for edges on positions 1 and 149992
20 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 9676 KB Output is correct
2 Correct 9 ms 9676 KB Output is correct
3 Correct 8 ms 9676 KB Output is correct
4 Correct 9 ms 9704 KB Output is correct
5 Correct 9 ms 9676 KB Output is correct
6 Correct 9 ms 9700 KB Output is correct
7 Correct 10 ms 9600 KB Output is correct
8 Correct 9 ms 9704 KB Output is correct
9 Correct 139 ms 27880 KB Output is correct
10 Correct 17 ms 11596 KB Output is correct
11 Correct 65 ms 19476 KB Output is correct
12 Correct 23 ms 12492 KB Output is correct
13 Correct 37 ms 15712 KB Output is correct
14 Correct 9 ms 9804 KB Output is correct
15 Correct 12 ms 9932 KB Output is correct
16 Correct 178 ms 27256 KB Output is correct
17 Correct 10 ms 9676 KB Output is correct
18 Correct 8 ms 9676 KB Output is correct
19 Correct 11 ms 9676 KB Output is correct
20 Correct 9 ms 9676 KB Output is correct
21 Correct 9 ms 9676 KB Output is correct
22 Correct 8 ms 9676 KB Output is correct
23 Correct 338 ms 48472 KB Output is correct
24 Correct 8 ms 9676 KB Output is correct
25 Correct 10 ms 9972 KB Output is correct
26 Correct 10 ms 10176 KB Output is correct
27 Correct 12 ms 10188 KB Output is correct
28 Correct 126 ms 25284 KB Output is correct
29 Correct 197 ms 32936 KB Output is correct
30 Correct 272 ms 40840 KB Output is correct
31 Correct 359 ms 48644 KB Output is correct
32 Correct 8 ms 9676 KB Output is correct
33 Correct 9 ms 9676 KB Output is correct
34 Correct 9 ms 9676 KB Output is correct
35 Correct 8 ms 9676 KB Output is correct
36 Correct 10 ms 9676 KB Output is correct
37 Correct 10 ms 9704 KB Output is correct
38 Correct 9 ms 9676 KB Output is correct
39 Correct 8 ms 9676 KB Output is correct
40 Correct 8 ms 9604 KB Output is correct
41 Correct 8 ms 9676 KB Output is correct
42 Correct 9 ms 9676 KB Output is correct
43 Correct 10 ms 9932 KB Output is correct
44 Correct 12 ms 10060 KB Output is correct
45 Correct 136 ms 24596 KB Output is correct
46 Correct 199 ms 31928 KB Output is correct
47 Correct 194 ms 31916 KB Output is correct
48 Correct 9 ms 9700 KB Output is correct
49 Correct 9 ms 9676 KB Output is correct
50 Correct 9 ms 9676 KB Output is correct
51 Incorrect 11 ms 9676 KB Tree @(5, 5) appears more than once: for edges on positions 3 and 6
52 Halted 0 ms 0 KB -