oj.uz

Submission #427174

# Submission time Handle Problem Language Result Execution time Memory
427174 2021-06-14T13:08:18 Z kai824 Port Facility (JOI17_port_facility) C++17
100 / 100
 768 ms 156756 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
//shouldn't need, just in case...

int eve[2000005];
list<list<int> > luol;
list<int> tmp;

bool mk[1000005];
int par[1000005],sz[1000005];
int getr(int x){
  if(par[x]==-1)return x;
  int t=getr(par[x]);
  if(mk[par[x]])mk[x]=!mk[x];
  return par[x]=t;
}

bool bruh=false;
int c,d;
void merge(int a,int b){
  //cout<<"MERGE"<<a<<' '<<b<<'\n';
  c=getr(a);d=getr(b);
  if(c==d){
    //cout<<"path1\n";
    //cout<<a<<' '<<b<<' '<<mk[a]<<mk[b]<<'\n';
    if(mk[a]==mk[b])bruh=true;
    return;
  }
  if(sz[c]<sz[d]){swap(c,d);swap(a,b);}
  par[d]=c;
  if(mk[a]==mk[b])mk[d]=true;//roots don't have marks so...
  sz[c]+=sz[d];
}

int32_t main(){
  ios_base::sync_with_stdio(false);cin.tie(0);
  int n;
  cin>>n;
  int a,b;
  for(int i=0;i<n;i++){
    cin>>a>>b;
    eve[a]=(i+1);
    eve[b]=-(i+1);
    par[i+1]=-1;sz[i+1]=i;
  }
  for(int i=1;i<=(n*2);i++){
    if(eve[i]>0){
      luol.push_back(*(new list<int>));
      luol.back().push_back(eve[i]);
    }else{
      eve[i]=-eve[i];
      tmp.clear();
      while(true){
        if(luol.size()==0){
          //cout<<"path 2\n";
          goto hell;
        }
        if(luol.back().back()==eve[i]){
          luol.back().pop_back();
          if(luol.back().size()==0)luol.pop_back();
          break;
        }
        merge(eve[i],luol.back().back());
        if(bruh)goto hell;
        tmp.splice(tmp.begin(),luol.back());
        luol.pop_back();
      }
      if(tmp.size()>0){
        luol.push_back(*(new list<int>));
        luol.back().splice(luol.back().begin(),tmp);
      }
    }

    /*for(auto x:luol){
      for(auto y:x)cout<<y<<' ';cout<<'\t';
    }cout<<'\n';*/
  }
  if(false){
    hell:;
    cout<<"0";
    return 0;
  }
  int ans=1;
  for(int i=1;i<=n;i++){
    if(par[i]==-1){
      ans*=2;
      ans%=1000000007;
    }
  }
  cout<<ans;
  return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 1 ms 460 KB Output is correct
27 Correct 2 ms 460 KB Output is correct
28 Correct 1 ms 460 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 460 KB Output is correct
31 Correct 1 ms 460 KB Output is correct
32 Correct 2 ms 460 KB Output is correct
33 Correct 2 ms 460 KB Output is correct
34 Correct 1 ms 460 KB Output is correct
35 Correct 1 ms 460 KB Output is correct
36 Correct 1 ms 588 KB Output is correct
37 Correct 2 ms 588 KB Output is correct
38 Correct 1 ms 460 KB Output is correct
39 Correct 1 ms 460 KB Output is correct
40 Correct 1 ms 460 KB Output is correct
41 Correct 1 ms 588 KB Output is correct
42 Correct 1 ms 588 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 1 ms 460 KB Output is correct

Subtask #3
56.0 / 56.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 1 ms 460 KB Output is correct
27 Correct 2 ms 460 KB Output is correct
28 Correct 1 ms 460 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 460 KB Output is correct
31 Correct 1 ms 460 KB Output is correct
32 Correct 2 ms 460 KB Output is correct
33 Correct 2 ms 460 KB Output is correct
34 Correct 1 ms 460 KB Output is correct
35 Correct 1 ms 460 KB Output is correct
36 Correct 1 ms 588 KB Output is correct
37 Correct 2 ms 588 KB Output is correct
38 Correct 1 ms 460 KB Output is correct
39 Correct 1 ms 460 KB Output is correct
40 Correct 1 ms 460 KB Output is correct
41 Correct 1 ms 588 KB Output is correct
42 Correct 1 ms 588 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 1 ms 460 KB Output is correct
45 Correct 46 ms 10360 KB Output is correct
46 Correct 52 ms 10416 KB Output is correct
47 Correct 49 ms 10308 KB Output is correct
48 Correct 53 ms 10304 KB Output is correct
49 Correct 49 ms 10360 KB Output is correct
50 Correct 44 ms 10352 KB Output is correct
51 Correct 40 ms 10052 KB Output is correct
52 Correct 37 ms 6584 KB Output is correct
53 Correct 46 ms 14404 KB Output is correct
54 Correct 55 ms 14468 KB Output is correct
55 Correct 34 ms 8900 KB Output is correct
56 Correct 36 ms 8972 KB Output is correct
57 Correct 53 ms 8172 KB Output is correct
58 Correct 35 ms 6464 KB Output is correct
59 Correct 38 ms 8392 KB Output is correct
60 Correct 44 ms 8524 KB Output is correct
61 Correct 50 ms 8540 KB Output is correct
62 Correct 47 ms 8324 KB Output is correct
63 Correct 37 ms 5700 KB Output is correct
64 Correct 44 ms 8488 KB Output is correct
65 Correct 39 ms 8832 KB Output is correct
66 Correct 33 ms 8904 KB Output is correct
67 Correct 56 ms 10612 KB Output is correct
68 Correct 50 ms 11996 KB Output is correct
69 Correct 48 ms 11608 KB Output is correct
70 Correct 51 ms 11716 KB Output is correct
71 Correct 55 ms 15824 KB Output is correct
72 Correct 50 ms 15684 KB Output is correct
73 Correct 51 ms 15740 KB Output is correct
74 Correct 47 ms 15812 KB Output is correct
75 Correct 51 ms 11076 KB Output is correct
76 Correct 46 ms 11076 KB Output is correct
77 Correct 46 ms 11072 KB Output is correct
78 Correct 47 ms 11640 KB Output is correct
79 Correct 47 ms 11588 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 332 KB Output is correct
18 Correct 0 ms 332 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 1 ms 460 KB Output is correct
27 Correct 2 ms 460 KB Output is correct
28 Correct 1 ms 460 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 460 KB Output is correct
31 Correct 1 ms 460 KB Output is correct
32 Correct 2 ms 460 KB Output is correct
33 Correct 2 ms 460 KB Output is correct
34 Correct 1 ms 460 KB Output is correct
35 Correct 1 ms 460 KB Output is correct
36 Correct 1 ms 588 KB Output is correct
37 Correct 2 ms 588 KB Output is correct
38 Correct 1 ms 460 KB Output is correct
39 Correct 1 ms 460 KB Output is correct
40 Correct 1 ms 460 KB Output is correct
41 Correct 1 ms 588 KB Output is correct
42 Correct 1 ms 588 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 1 ms 460 KB Output is correct
45 Correct 46 ms 10360 KB Output is correct
46 Correct 52 ms 10416 KB Output is correct
47 Correct 49 ms 10308 KB Output is correct
48 Correct 53 ms 10304 KB Output is correct
49 Correct 49 ms 10360 KB Output is correct
50 Correct 44 ms 10352 KB Output is correct
51 Correct 40 ms 10052 KB Output is correct
52 Correct 37 ms 6584 KB Output is correct
53 Correct 46 ms 14404 KB Output is correct
54 Correct 55 ms 14468 KB Output is correct
55 Correct 34 ms 8900 KB Output is correct
56 Correct 36 ms 8972 KB Output is correct
57 Correct 53 ms 8172 KB Output is correct
58 Correct 35 ms 6464 KB Output is correct
59 Correct 38 ms 8392 KB Output is correct
60 Correct 44 ms 8524 KB Output is correct
61 Correct 50 ms 8540 KB Output is correct
62 Correct 47 ms 8324 KB Output is correct
63 Correct 37 ms 5700 KB Output is correct
64 Correct 44 ms 8488 KB Output is correct
65 Correct 39 ms 8832 KB Output is correct
66 Correct 33 ms 8904 KB Output is correct
67 Correct 56 ms 10612 KB Output is correct
68 Correct 50 ms 11996 KB Output is correct
69 Correct 48 ms 11608 KB Output is correct
70 Correct 51 ms 11716 KB Output is correct
71 Correct 55 ms 15824 KB Output is correct
72 Correct 50 ms 15684 KB Output is correct
73 Correct 51 ms 15740 KB Output is correct
74 Correct 47 ms 15812 KB Output is correct
75 Correct 51 ms 11076 KB Output is correct
76 Correct 46 ms 11076 KB Output is correct
77 Correct 46 ms 11072 KB Output is correct
78 Correct 47 ms 11640 KB Output is correct
79 Correct 47 ms 11588 KB Output is correct
80 Correct 737 ms 115444 KB Output is correct
81 Correct 716 ms 115236 KB Output is correct
82 Correct 699 ms 115284 KB Output is correct
83 Correct 707 ms 115236 KB Output is correct
84 Correct 712 ms 115188 KB Output is correct
85 Correct 583 ms 115196 KB Output is correct
86 Correct 517 ms 109764 KB Output is correct
87 Correct 469 ms 77388 KB Output is correct
88 Correct 523 ms 155752 KB Output is correct
89 Correct 690 ms 155772 KB Output is correct
90 Correct 514 ms 101068 KB Output is correct
91 Correct 547 ms 101928 KB Output is correct
92 Correct 598 ms 94280 KB Output is correct
93 Correct 446 ms 77404 KB Output is correct
94 Correct 593 ms 96060 KB Output is correct
95 Correct 695 ms 96292 KB Output is correct
96 Correct 688 ms 98116 KB Output is correct
97 Correct 468 ms 96144 KB Output is correct
98 Correct 501 ms 91176 KB Output is correct
99 Correct 528 ms 97424 KB Output is correct
100 Correct 491 ms 101948 KB Output is correct
101 Correct 474 ms 100952 KB Output is correct
102 Correct 712 ms 117544 KB Output is correct
103 Correct 768 ms 117512 KB Output is correct
104 Correct 726 ms 114992 KB Output is correct
105 Correct 736 ms 114924 KB Output is correct
106 Correct 732 ms 156756 KB Output is correct
107 Correct 709 ms 156628 KB Output is correct
108 Correct 750 ms 156752 KB Output is correct
109 Correct 688 ms 156656 KB Output is correct
110 Correct 725 ms 109764 KB Output is correct
111 Correct 685 ms 109696 KB Output is correct
112 Correct 660 ms 109756 KB Output is correct
113 Correct 712 ms 115192 KB Output is correct
114 Correct 755 ms 115008 KB Output is correct