#include "meetings.h"
#include <bits/stdc++.h>
typedef long long ll;
typedef long double ld;
using namespace std;
#define F first
#define S second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define SZ(x) (int)(x).size()
mt19937 rnd(228);
const int N = 2010;
int lca[N][N], used[N], timer;
int get(int a, int b) {
if (a > b) {
swap(a, b);
}
return lca[a][b];
}
void update_lca(int a, int b, int c) {
if (a > b) {
swap(a, b);
}
if (lca[a][b] != -1) {
assert(lca[a][b] == c);
}
lca[a][b] = c;
}
vector<pair<int, int>> edge;
void dfs(int root, vector<int> have) {
if (have.empty()) {
return;
}
shuffle(all(have), rnd);
vector<vector<int>> nh(1);
vector<int> up(1);
nh[0].pb(have[0]);
up[0] = have[0];
timer++;
used[have[0]] = timer;
for (int i = 1; i < SZ(have); i++) {
if (used[have[i]] == timer) {
continue;
}
used[have[i]] = timer;
bool ok = false;
vector<int> order;
for (int j = 0; j < SZ(nh); j++) {
order.pb(j);
}
shuffle(all(order), rnd);
for (int j : order) {
if (ok) {
break;
}
int v;
if (get(up[j], have[i]) != -1) {
v = get(up[j], have[i]);
}
else {
v = Query(root, up[j], have[i]);
}
if (v != root) {
if (v == up[j]) {
update_lca(v, up[j], up[j]);
nh[j].pb(have[i]);
ok = true;
break;
}
else {
for (auto it : nh[j]) {
update_lca(it, have[i], v);
update_lca(it, v, v);
}
update_lca(have[i], v, v);
used[v] = timer;
up[j] = v;
nh[j].pb(have[i]);
if (v != have[i]) {
nh[j].pb(v);
}
ok = true;
break;
}
}
}
if (!ok) {
nh.pb({have[i]});
up.pb(have[i]);
}
}
for (auto it : up) {
edge.pb({root, it});
}
for (int i = 0; i < SZ(nh); i++) {
for (int j = 0; j < SZ(nh[i]); j++) {
if (nh[i][j] == up[i]) {
nh[i].erase(nh[i].begin() + j);
break;
}
}
dfs(up[i], nh[i]);
}
}
void Solve(int n) {
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
if (i == j) {
lca[i][j] = i;
}
else {
lca[i][j] = -1;
}
}
}
int root = rnd() % n;
vector<int> have;
for (int i = 0; i < n; i++) {
if (i != root) {
have.pb(i);
}
}
dfs(root, have);
for (auto &it : edge) {
if (it.F > it.S) {
swap(it.F, it.S);
}
Bridge(it.F, it.S);
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
300 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
6 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
300 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
6 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
632 KB |
Output is correct |
15 |
Correct |
6 ms |
504 KB |
Output is correct |
16 |
Correct |
5 ms |
632 KB |
Output is correct |
17 |
Correct |
5 ms |
504 KB |
Output is correct |
18 |
Correct |
5 ms |
504 KB |
Output is correct |
19 |
Correct |
5 ms |
504 KB |
Output is correct |
20 |
Correct |
5 ms |
632 KB |
Output is correct |
21 |
Correct |
5 ms |
504 KB |
Output is correct |
22 |
Correct |
5 ms |
508 KB |
Output is correct |
23 |
Correct |
5 ms |
636 KB |
Output is correct |
24 |
Correct |
5 ms |
504 KB |
Output is correct |
25 |
Correct |
6 ms |
504 KB |
Output is correct |
26 |
Correct |
5 ms |
632 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
5 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
300 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
5 ms |
376 KB |
Output is correct |
5 |
Correct |
5 ms |
376 KB |
Output is correct |
6 |
Correct |
5 ms |
376 KB |
Output is correct |
7 |
Correct |
5 ms |
376 KB |
Output is correct |
8 |
Correct |
5 ms |
376 KB |
Output is correct |
9 |
Correct |
5 ms |
376 KB |
Output is correct |
10 |
Correct |
5 ms |
376 KB |
Output is correct |
11 |
Correct |
5 ms |
376 KB |
Output is correct |
12 |
Correct |
5 ms |
376 KB |
Output is correct |
13 |
Correct |
6 ms |
376 KB |
Output is correct |
14 |
Correct |
5 ms |
632 KB |
Output is correct |
15 |
Correct |
6 ms |
504 KB |
Output is correct |
16 |
Correct |
5 ms |
632 KB |
Output is correct |
17 |
Correct |
5 ms |
504 KB |
Output is correct |
18 |
Correct |
5 ms |
504 KB |
Output is correct |
19 |
Correct |
5 ms |
504 KB |
Output is correct |
20 |
Correct |
5 ms |
632 KB |
Output is correct |
21 |
Correct |
5 ms |
504 KB |
Output is correct |
22 |
Correct |
5 ms |
508 KB |
Output is correct |
23 |
Correct |
5 ms |
636 KB |
Output is correct |
24 |
Correct |
5 ms |
504 KB |
Output is correct |
25 |
Correct |
6 ms |
504 KB |
Output is correct |
26 |
Correct |
5 ms |
632 KB |
Output is correct |
27 |
Correct |
22 ms |
2168 KB |
Output is correct |
28 |
Correct |
20 ms |
1912 KB |
Output is correct |
29 |
Correct |
23 ms |
1912 KB |
Output is correct |
30 |
Correct |
27 ms |
2040 KB |
Output is correct |
31 |
Correct |
20 ms |
2040 KB |
Output is correct |
32 |
Correct |
22 ms |
2040 KB |
Output is correct |
33 |
Correct |
28 ms |
2040 KB |
Output is correct |
34 |
Correct |
30 ms |
2040 KB |
Output is correct |
35 |
Correct |
24 ms |
1912 KB |
Output is correct |
36 |
Correct |
23 ms |
1912 KB |
Output is correct |
37 |
Correct |
149 ms |
2552 KB |
Output is correct |
38 |
Correct |
100 ms |
2296 KB |
Output is correct |
39 |
Correct |
127 ms |
2296 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
2282 ms |
16888 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |