oj.uz

Submission #693757

# Submission time Handle Problem Language Result Execution time Memory
693757 2023-02-03T07:58:51 Z EthanKim8683 Railway (BOI17_railway) C++17
100 / 100
 191 ms 46068 KB 
#include<bits/stdc++.h>
using namespace std;
using I=int;
using B=bool;
const I N=100000;
const I LOGN=17;
vector<pair<I,I>>adjs[N];
set<I>incs[N];
vector<I>rems[N];
I ancs[N][LOGN];
I tbgs[N],teds[N];
vector<I>ress;
I t=0;
I k;
void dfs1(I a,I p){
  tbgs[a]=t++;
  ancs[a][0]=p;
  for(I i=1;i<LOGN;i++)ancs[a][i]=ancs[ancs[a][i-1]][i-1];
  for(auto[b,i]:adjs[a])if(b!=p)dfs1(b,a);
  teds[a]=t;
}
B anc(I a,I b){
  return tbgs[a]<=tbgs[b]&&teds[a]>=teds[b];
}
I lca(I a,I b){
  if(anc(a,b))return a;
  if(anc(b,a))return b;
  for(I i=LOGN-1;i>=0;i--)if(!anc(ancs[a][i],b))a=ancs[a][i];
  return ancs[a][0];
}
void dfs2(I a,I p=-1){
  for(auto[b,i]:adjs[a])if(b!=p){
    dfs2(b,a);
    if(incs[b].size()>=k)ress.push_back(i);
    if(incs[a].size()<incs[b].size())swap(incs[a],incs[b]);
    for(auto x:incs[b])incs[a].insert(x);
  }
  for(auto x:rems[a])incs[a].erase(x);
}
I main(){
  cin.tie(0)->sync_with_stdio(0);
  I n,m;cin>>n>>m>>k;
  for(I i=0;i<n-1;i++){
    I a,b;cin>>a>>b,a--,b--;
    adjs[a].push_back({b,i});
    adjs[b].push_back({a,i});
  }
  dfs1(0,0);
  for(I i=0;i<m;i++){
    I s;cin>>s;
    I y=-1;
    for(I j=0;j<s;j++){
      I x;cin>>x,x--;
      y=y==-1?x:lca(y,x);
      incs[x].insert(i);
    }
    rems[y].push_back(i);
  }
  dfs2(0);
  sort(ress.begin(),ress.end());
  printf("%i\n",ress.size());
  for(auto x:ress)printf("%i ",x+1);
}

Compilation message

railway.cpp: In function 'void dfs2(I, I)':
railway.cpp:34:22: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'I' {aka 'int'} [-Wsign-compare]
   34 |     if(incs[b].size()>=k)ress.push_back(i);
      |        ~~~~~~~~~~~~~~^~~
railway.cpp: In function 'I main()':
railway.cpp:61:12: warning: format '%i' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   61 |   printf("%i\n",ress.size());
      |           ~^    ~~~~~~~~~~~
      |            |             |
      |            int           std::vector<int>::size_type {aka long unsigned int}
      |           %li

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9728 KB Output is correct
2 Correct 9 ms 11020 KB Output is correct
3 Correct 12 ms 10964 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9720 KB Output is correct
6 Correct 10 ms 11772 KB Output is correct
7 Correct 9 ms 11092 KB Output is correct
8 Correct 9 ms 11016 KB Output is correct
9 Correct 9 ms 11220 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 5 ms 9728 KB Output is correct
13 Correct 5 ms 9692 KB Output is correct
14 Correct 5 ms 9704 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9728 KB Output is correct
2 Correct 9 ms 11020 KB Output is correct
3 Correct 12 ms 10964 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9720 KB Output is correct
6 Correct 10 ms 11772 KB Output is correct
7 Correct 9 ms 11092 KB Output is correct
8 Correct 9 ms 11016 KB Output is correct
9 Correct 9 ms 11220 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 5 ms 9728 KB Output is correct
13 Correct 5 ms 9692 KB Output is correct
14 Correct 5 ms 9704 KB Output is correct
15 Correct 37 ms 16716 KB Output is correct
16 Correct 38 ms 16900 KB Output is correct
17 Correct 38 ms 16892 KB Output is correct
18 Correct 11 ms 11988 KB Output is correct
19 Correct 10 ms 11272 KB Output is correct
20 Correct 39 ms 16212 KB Output is correct
21 Correct 42 ms 16156 KB Output is correct
22 Correct 5 ms 9684 KB Output is correct
23 Correct 10 ms 11020 KB Output is correct
24 Correct 10 ms 11016 KB Output is correct
25 Correct 5 ms 9684 KB Output is correct
26 Correct 5 ms 9684 KB Output is correct
27 Correct 10 ms 11888 KB Output is correct
28 Correct 10 ms 11128 KB Output is correct
29 Correct 12 ms 11092 KB Output is correct
30 Correct 13 ms 11220 KB Output is correct
31 Correct 5 ms 9684 KB Output is correct
32 Correct 6 ms 9628 KB Output is correct
33 Correct 5 ms 9684 KB Output is correct
34 Correct 5 ms 9684 KB Output is correct
35 Correct 5 ms 9684 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 127 ms 45536 KB Output is correct
2 Correct 5 ms 9684 KB Output is correct
3 Correct 131 ms 45156 KB Output is correct
4 Correct 114 ms 44876 KB Output is correct
5 Correct 95 ms 43564 KB Output is correct
6 Correct 124 ms 46028 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 37840 KB Output is correct
2 Correct 161 ms 32748 KB Output is correct
3 Correct 176 ms 38268 KB Output is correct
4 Correct 161 ms 38136 KB Output is correct
5 Correct 191 ms 38452 KB Output is correct
6 Correct 121 ms 38152 KB Output is correct
7 Correct 126 ms 38092 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 118 ms 37840 KB Output is correct
2 Correct 161 ms 32748 KB Output is correct
3 Correct 176 ms 38268 KB Output is correct
4 Correct 161 ms 38136 KB Output is correct
5 Correct 191 ms 38452 KB Output is correct
6 Correct 121 ms 38152 KB Output is correct
7 Correct 126 ms 38092 KB Output is correct
8 Correct 110 ms 36724 KB Output is correct
9 Correct 113 ms 36660 KB Output is correct
10 Correct 85 ms 43452 KB Output is correct
11 Correct 87 ms 43412 KB Output is correct
12 Correct 72 ms 27168 KB Output is correct
13 Correct 73 ms 27092 KB Output is correct
14 Correct 132 ms 33152 KB Output is correct
15 Correct 134 ms 33356 KB Output is correct
16 Correct 181 ms 39292 KB Output is correct
17 Correct 164 ms 39628 KB Output is correct
18 Correct 161 ms 37644 KB Output is correct
19 Correct 154 ms 33404 KB Output is correct
20 Correct 120 ms 38308 KB Output is correct
21 Correct 123 ms 38340 KB Output is correct
22 Correct 126 ms 38400 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9728 KB Output is correct
2 Correct 9 ms 11020 KB Output is correct
3 Correct 12 ms 10964 KB Output is correct
4 Correct 5 ms 9684 KB Output is correct
5 Correct 5 ms 9720 KB Output is correct
6 Correct 10 ms 11772 KB Output is correct
7 Correct 9 ms 11092 KB Output is correct
8 Correct 9 ms 11016 KB Output is correct
9 Correct 9 ms 11220 KB Output is correct
10 Correct 5 ms 9684 KB Output is correct
11 Correct 5 ms 9684 KB Output is correct
12 Correct 5 ms 9728 KB Output is correct
13 Correct 5 ms 9692 KB Output is correct
14 Correct 5 ms 9704 KB Output is correct
15 Correct 37 ms 16716 KB Output is correct
16 Correct 38 ms 16900 KB Output is correct
17 Correct 38 ms 16892 KB Output is correct
18 Correct 11 ms 11988 KB Output is correct
19 Correct 10 ms 11272 KB Output is correct
20 Correct 39 ms 16212 KB Output is correct
21 Correct 42 ms 16156 KB Output is correct
22 Correct 5 ms 9684 KB Output is correct
23 Correct 10 ms 11020 KB Output is correct
24 Correct 10 ms 11016 KB Output is correct
25 Correct 5 ms 9684 KB Output is correct
26 Correct 5 ms 9684 KB Output is correct
27 Correct 10 ms 11888 KB Output is correct
28 Correct 10 ms 11128 KB Output is correct
29 Correct 12 ms 11092 KB Output is correct
30 Correct 13 ms 11220 KB Output is correct
31 Correct 5 ms 9684 KB Output is correct
32 Correct 6 ms 9628 KB Output is correct
33 Correct 5 ms 9684 KB Output is correct
34 Correct 5 ms 9684 KB Output is correct
35 Correct 5 ms 9684 KB Output is correct
36 Correct 127 ms 45536 KB Output is correct
37 Correct 5 ms 9684 KB Output is correct
38 Correct 131 ms 45156 KB Output is correct
39 Correct 114 ms 44876 KB Output is correct
40 Correct 95 ms 43564 KB Output is correct
41 Correct 124 ms 46028 KB Output is correct
42 Correct 118 ms 37840 KB Output is correct
43 Correct 161 ms 32748 KB Output is correct
44 Correct 176 ms 38268 KB Output is correct
45 Correct 161 ms 38136 KB Output is correct
46 Correct 191 ms 38452 KB Output is correct
47 Correct 121 ms 38152 KB Output is correct
48 Correct 126 ms 38092 KB Output is correct
49 Correct 110 ms 36724 KB Output is correct
50 Correct 113 ms 36660 KB Output is correct
51 Correct 85 ms 43452 KB Output is correct
52 Correct 87 ms 43412 KB Output is correct
53 Correct 72 ms 27168 KB Output is correct
54 Correct 73 ms 27092 KB Output is correct
55 Correct 132 ms 33152 KB Output is correct
56 Correct 134 ms 33356 KB Output is correct
57 Correct 181 ms 39292 KB Output is correct
58 Correct 164 ms 39628 KB Output is correct
59 Correct 161 ms 37644 KB Output is correct
60 Correct 154 ms 33404 KB Output is correct
61 Correct 120 ms 38308 KB Output is correct
62 Correct 123 ms 38340 KB Output is correct
63 Correct 126 ms 38400 KB Output is correct
64 Correct 118 ms 37296 KB Output is correct
65 Correct 190 ms 44860 KB Output is correct
66 Correct 157 ms 40472 KB Output is correct
67 Correct 137 ms 36336 KB Output is correct
68 Correct 68 ms 25612 KB Output is correct
69 Correct 71 ms 25612 KB Output is correct
70 Correct 120 ms 38536 KB Output is correct
71 Correct 100 ms 36712 KB Output is correct
72 Correct 5 ms 9684 KB Output is correct
73 Correct 9 ms 11012 KB Output is correct
74 Correct 9 ms 11092 KB Output is correct
75 Correct 5 ms 9724 KB Output is correct
76 Correct 5 ms 9684 KB Output is correct
77 Correct 10 ms 11860 KB Output is correct
78 Correct 9 ms 11092 KB Output is correct
79 Correct 8 ms 11092 KB Output is correct
80 Correct 9 ms 11140 KB Output is correct
81 Correct 5 ms 9684 KB Output is correct
82 Correct 5 ms 9684 KB Output is correct
83 Correct 5 ms 9700 KB Output is correct
84 Correct 5 ms 9728 KB Output is correct
85 Correct 5 ms 9684 KB Output is correct
86 Correct 39 ms 16876 KB Output is correct
87 Correct 40 ms 16844 KB Output is correct
88 Correct 40 ms 16844 KB Output is correct
89 Correct 11 ms 12040 KB Output is correct
90 Correct 10 ms 11240 KB Output is correct
91 Correct 37 ms 16212 KB Output is correct
92 Correct 36 ms 16092 KB Output is correct
93 Correct 6 ms 9684 KB Output is correct
94 Correct 121 ms 45544 KB Output is correct
95 Correct 136 ms 45236 KB Output is correct
96 Correct 117 ms 44676 KB Output is correct
97 Correct 95 ms 43608 KB Output is correct
98 Correct 120 ms 46068 KB Output is correct
99 Correct 179 ms 41856 KB Output is correct
100 Correct 184 ms 39096 KB Output is correct
101 Correct 166 ms 39496 KB Output is correct
102 Correct 149 ms 33080 KB Output is correct
103 Correct 118 ms 38092 KB Output is correct
104 Correct 121 ms 38380 KB Output is correct
105 Correct 123 ms 38076 KB Output is correct
106 Correct 114 ms 36836 KB Output is correct
107 Correct 114 ms 36912 KB Output is correct
108 Correct 82 ms 43440 KB Output is correct
109 Correct 82 ms 43400 KB Output is correct
110 Correct 75 ms 27128 KB Output is correct
111 Correct 75 ms 27176 KB Output is correct
112 Correct 155 ms 33056 KB Output is correct
113 Correct 135 ms 32964 KB Output is correct