# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
536092 |
2022-03-12T10:45:50 Z |
blue |
Meetings (JOI19_meetings) |
C++17 |
|
904 ms |
1164 KB |
#include "meetings.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <set>
#include <random>
using namespace std;
using vi = vector<int>;
#define sz(x) int(x.size())
const int mx = 2'000;
int N;
set<int> edge[mx];
void cut(int u, int v)
{
edge[u].erase(v);
edge[v].erase(u);
}
void join(int u, int v)
{
edge[u].insert(v);
edge[v].insert(u);
}
vi subtree;
vi depth;
int goodct;
void dfs(int u, int p, vi& good)
{
goodct++;
for(int v : edge[u])
{
if(v == p) continue;
if(!good[v]) continue;
depth[v] = depth[u] + 1;
dfs(v, u, good);
subtree[u] += subtree[v];
}
}
vi childlist;
vi added(mx, 0);
void computelist(int u, int p, vi& newgood, vi& oldgood)
{
newgood[u] = 1;
for(int v : edge[u])
{
if(v == p) continue;
if(!oldgood[v]) continue;
computelist(v, u, newgood, oldgood);
}
}
void Locate(vi good, int X)
{
// cerr << "Locate " << X << " ";
// for(int f = 0; f < N; f++) cerr << good[f] << ' ';
// cerr << "\n";
subtree = vi(N, 1);
depth = vi(N, 1);
int rt = 0;
while(!good[rt]) rt++;
goodct = 0;
dfs(rt, rt, good);
int cent = -1;
for(int i = 0; i < N; i++)
{
if(!good[i]) continue;
if(2*subtree[i] < goodct) continue;
if(cent == -1) cent = i;
else if(depth[i] > depth[cent]) cent = i;
}
childlist.clear();
for(int x : edge[cent])
if(good[x])
childlist.push_back(x);
sort(childlist.begin(), childlist.end(), [] (int p, int q)
{
return subtree[p] > subtree[q];
});
int desc = -1;
for(int h = 0; h+1 < sz(childlist); h++)
{
int A = childlist[h], B = childlist[h+1];
int Q = Query(A, B, X);
if(Q == A)
{
desc = A;
break;
}
else if(Q == B)
{
desc = B;
break;
}
else if(Q == cent)
{
continue;
}
else if(Q == X)
{
int Q2 = Query(cent, X, A);
if(Q2 == X)
{
cut(cent, A);
join(cent, X);
join(A, X);
added[X] = 1;
return;
}
else
{
cut(cent, B);
join(cent, X);
join(B, X);
added[X] = 1;
return;
}
}
else
{
int Q2 = Query(cent, Q, A);
if(Q2 == Q)
{
cut(cent, A);
join(cent, Q);
join(Q, A);
join(Q, X);
added[Q] = added[X] = 1;
}
else
{
cut(cent, B);
join(cent, Q);
join(Q, B);
join(Q, X);
added[Q] = added[X] = 1;
}
return;
}
}
if(desc == -1)
{
if(sz(childlist) % 2 == 1)
{
int z = childlist.back();
int Q = Query(cent, z, X);
if(Q == cent)
{
join(cent, X);
added[X] = 1;
return;
}
else if(Q == z)
{
desc = z;
}
else if(Q == X)
{
cut(cent, z);
join(cent, X);
join(X, z);
added[X] = 1;
return;
}
else
{
cut(cent, z);
join(cent, Q);
join(Q, X);
join(Q, z);
added[X] = added[Q] = 1;
return;
}
}
else
{
join(cent, X);
added[X] = 1;
return;
}
}
vi goodlist(N, 0);
computelist(desc, cent, goodlist, good);
// cerr << "desc = " << desc << '\n';
Locate(goodlist, X);
}
void Solve(int N_)
{
N = N_;
edge[0].insert(1);
edge[1].insert(0);
added[0] = added[1] = 1;
vi addlist;
for(int X = 2; X <= N-1; X++)
addlist.push_back(X);
// for(int k = 0; k < 1'000'000; k++)
// {
// int u = rand() % sz(addlist);
// int v = rand() % sz(addlist);
// swap(addlist[u], addlist[v]);
// }
for(int X : addlist)
{
if(added[X]) continue;
// cerr << "original new\n";
Locate(added, X);
}
for(int u = 0; u < N; u++)
for(int v : edge[u])
if(u < v)
Bridge(u, v);
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
0 ms |
336 KB |
Output is correct |
4 |
Correct |
0 ms |
336 KB |
Output is correct |
5 |
Correct |
0 ms |
336 KB |
Output is correct |
6 |
Correct |
0 ms |
336 KB |
Output is correct |
7 |
Correct |
0 ms |
336 KB |
Output is correct |
8 |
Correct |
0 ms |
336 KB |
Output is correct |
9 |
Correct |
0 ms |
336 KB |
Output is correct |
10 |
Correct |
0 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
0 ms |
336 KB |
Output is correct |
13 |
Correct |
0 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
0 ms |
336 KB |
Output is correct |
4 |
Correct |
0 ms |
336 KB |
Output is correct |
5 |
Correct |
0 ms |
336 KB |
Output is correct |
6 |
Correct |
0 ms |
336 KB |
Output is correct |
7 |
Correct |
0 ms |
336 KB |
Output is correct |
8 |
Correct |
0 ms |
336 KB |
Output is correct |
9 |
Correct |
0 ms |
336 KB |
Output is correct |
10 |
Correct |
0 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
0 ms |
336 KB |
Output is correct |
13 |
Correct |
0 ms |
336 KB |
Output is correct |
14 |
Correct |
1 ms |
464 KB |
Output is correct |
15 |
Correct |
1 ms |
464 KB |
Output is correct |
16 |
Correct |
1 ms |
464 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
464 KB |
Output is correct |
19 |
Correct |
1 ms |
460 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
1 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
464 KB |
Output is correct |
24 |
Correct |
1 ms |
464 KB |
Output is correct |
25 |
Correct |
1 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
336 KB |
Output is correct |
3 |
Correct |
0 ms |
336 KB |
Output is correct |
4 |
Correct |
0 ms |
336 KB |
Output is correct |
5 |
Correct |
0 ms |
336 KB |
Output is correct |
6 |
Correct |
0 ms |
336 KB |
Output is correct |
7 |
Correct |
0 ms |
336 KB |
Output is correct |
8 |
Correct |
0 ms |
336 KB |
Output is correct |
9 |
Correct |
0 ms |
336 KB |
Output is correct |
10 |
Correct |
0 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
0 ms |
336 KB |
Output is correct |
13 |
Correct |
0 ms |
336 KB |
Output is correct |
14 |
Correct |
1 ms |
464 KB |
Output is correct |
15 |
Correct |
1 ms |
464 KB |
Output is correct |
16 |
Correct |
1 ms |
464 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
464 KB |
Output is correct |
19 |
Correct |
1 ms |
460 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
1 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
464 KB |
Output is correct |
24 |
Correct |
1 ms |
464 KB |
Output is correct |
25 |
Correct |
1 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
27 |
Correct |
7 ms |
464 KB |
Output is correct |
28 |
Correct |
7 ms |
464 KB |
Output is correct |
29 |
Correct |
8 ms |
528 KB |
Output is correct |
30 |
Correct |
7 ms |
464 KB |
Output is correct |
31 |
Correct |
6 ms |
516 KB |
Output is correct |
32 |
Correct |
8 ms |
464 KB |
Output is correct |
33 |
Correct |
13 ms |
464 KB |
Output is correct |
34 |
Correct |
15 ms |
464 KB |
Output is correct |
35 |
Correct |
15 ms |
464 KB |
Output is correct |
36 |
Correct |
8 ms |
524 KB |
Output is correct |
37 |
Correct |
12 ms |
464 KB |
Output is correct |
38 |
Correct |
12 ms |
464 KB |
Output is correct |
39 |
Correct |
8 ms |
540 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
533 ms |
1028 KB |
Output is correct |
2 |
Correct |
527 ms |
980 KB |
Output is correct |
3 |
Correct |
543 ms |
1088 KB |
Output is correct |
4 |
Correct |
543 ms |
888 KB |
Output is correct |
5 |
Correct |
488 ms |
884 KB |
Output is correct |
6 |
Correct |
380 ms |
840 KB |
Output is correct |
7 |
Correct |
632 ms |
864 KB |
Output is correct |
8 |
Correct |
707 ms |
1040 KB |
Output is correct |
9 |
Correct |
779 ms |
988 KB |
Output is correct |
10 |
Correct |
696 ms |
796 KB |
Output is correct |
11 |
Correct |
808 ms |
904 KB |
Output is correct |
12 |
Correct |
598 ms |
1040 KB |
Output is correct |
13 |
Correct |
578 ms |
1004 KB |
Output is correct |
14 |
Correct |
803 ms |
936 KB |
Output is correct |
15 |
Correct |
713 ms |
820 KB |
Output is correct |
16 |
Correct |
768 ms |
912 KB |
Output is correct |
17 |
Correct |
756 ms |
792 KB |
Output is correct |
18 |
Correct |
627 ms |
884 KB |
Output is correct |
19 |
Correct |
669 ms |
908 KB |
Output is correct |
20 |
Correct |
798 ms |
1008 KB |
Output is correct |
21 |
Correct |
881 ms |
1068 KB |
Output is correct |
22 |
Correct |
811 ms |
908 KB |
Output is correct |
23 |
Correct |
837 ms |
928 KB |
Output is correct |
24 |
Correct |
825 ms |
932 KB |
Output is correct |
25 |
Correct |
745 ms |
908 KB |
Output is correct |
26 |
Correct |
733 ms |
1024 KB |
Output is correct |
27 |
Correct |
749 ms |
932 KB |
Output is correct |
28 |
Correct |
828 ms |
852 KB |
Output is correct |
29 |
Correct |
699 ms |
860 KB |
Output is correct |
30 |
Correct |
702 ms |
864 KB |
Output is correct |
31 |
Correct |
769 ms |
836 KB |
Output is correct |
32 |
Correct |
904 ms |
1096 KB |
Output is correct |
33 |
Correct |
590 ms |
1164 KB |
Output is correct |
34 |
Correct |
8 ms |
464 KB |
Output is correct |
35 |
Correct |
8 ms |
464 KB |
Output is correct |
36 |
Correct |
11 ms |
464 KB |
Output is correct |
37 |
Correct |
9 ms |
464 KB |
Output is correct |
38 |
Correct |
8 ms |
516 KB |
Output is correct |
39 |
Correct |
9 ms |
508 KB |
Output is correct |
40 |
Correct |
14 ms |
516 KB |
Output is correct |
41 |
Correct |
16 ms |
464 KB |
Output is correct |
42 |
Correct |
21 ms |
464 KB |
Output is correct |
43 |
Correct |
8 ms |
464 KB |
Output is correct |
44 |
Correct |
12 ms |
464 KB |
Output is correct |
45 |
Correct |
11 ms |
464 KB |
Output is correct |
46 |
Correct |
13 ms |
464 KB |
Output is correct |
47 |
Correct |
1 ms |
336 KB |
Output is correct |
48 |
Correct |
1 ms |
336 KB |
Output is correct |
49 |
Correct |
1 ms |
464 KB |
Output is correct |
50 |
Correct |
1 ms |
464 KB |
Output is correct |
51 |
Correct |
1 ms |
464 KB |
Output is correct |
52 |
Correct |
1 ms |
336 KB |
Output is correct |
53 |
Correct |
1 ms |
336 KB |
Output is correct |
54 |
Correct |
1 ms |
336 KB |
Output is correct |
55 |
Correct |
1 ms |
336 KB |
Output is correct |
56 |
Correct |
1 ms |
464 KB |
Output is correct |
57 |
Correct |
1 ms |
464 KB |
Output is correct |
58 |
Correct |
1 ms |
464 KB |
Output is correct |
59 |
Correct |
1 ms |
464 KB |
Output is correct |
60 |
Correct |
1 ms |
336 KB |
Output is correct |
61 |
Correct |
1 ms |
336 KB |
Output is correct |
62 |
Correct |
1 ms |
336 KB |
Output is correct |
63 |
Correct |
0 ms |
336 KB |
Output is correct |
64 |
Correct |
0 ms |
336 KB |
Output is correct |
65 |
Correct |
1 ms |
336 KB |
Output is correct |
66 |
Correct |
0 ms |
336 KB |
Output is correct |
67 |
Correct |
0 ms |
336 KB |
Output is correct |
68 |
Correct |
0 ms |
336 KB |
Output is correct |
69 |
Correct |
0 ms |
336 KB |
Output is correct |
70 |
Correct |
0 ms |
336 KB |
Output is correct |
71 |
Correct |
0 ms |
336 KB |
Output is correct |
72 |
Correct |
0 ms |
336 KB |
Output is correct |