#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l) == r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
const int MAX_N = 300010;
// function : Query(a, b, c)
// function : Bridge(a, b)
random_device rd;
//mt19937 gen(rd());
mt19937 gen;
#define qry Query
vector<pair<int,int>> res;
void solve(vector<int> ids) {
if (ids.size() <= 1) return;
if (ids.size() == 2) {
res.pb(ids[0], ids[1]);
return;
}
shuffle(AI(ids), gen);
int a = ids[0], b = ids[1];
map<int, vector<int>> subtree;
vector<int> sorted;
for (int i = 2;i < ids.size();++i) {
int x = ids[i], anc = qry(a, b, x);
subtree[anc].pb(x);
if (anc != a && anc != b)
sorted.pb(anc);
}
subtree[a].pb(a), subtree[b].pb(b);
for (auto [_, sid] : subtree)
solve(sid);
sort(AI(sorted));
sorted.erase(unique(AI(sorted)), end(sorted));
int root = a;
set<pair<int,int>> vis;
auto cmp = [&](int a, int b) {
if (vis.count({a, b})) return true;
if (vis.count({b, a})) return false;
int mid = qry(root, a, b);
vis.insert({mid, a + b - mid});
return mid == a;
};
stable_sort(AI(sorted), cmp);
int lst = root;
for (int u : sorted) {
res.pb(lst, u), lst = u;
}
res.pb(lst, b);
}
void Solve(int N) {
static int cnt;
assert(++cnt == 1);
vector<int> ids(N); iota(AI(ids), 0);
solve(ids);
assert(res.size() == N-1);
for (auto &[a, b] : res) {
if (a > b) swap(a, b);
DE(a, b);
Bridge(a, b);
}
}
Compilation message
meetings.cpp: In function 'void solve(std::vector<int>)':
meetings.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
43 | for (int i = 2;i < ids.size();++i) {
| ~~^~~~~~~~~~~~
In file included from /usr/include/c++/9/cassert:44,
from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:33,
from meetings.cpp:2:
meetings.cpp: In function 'void Solve(int)':
meetings.cpp:85:20: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
85 | assert(res.size() == N-1);
| ~~~~~~~~~~~^~~~~~
meetings.cpp:15:17: warning: statement has no effect [-Wunused-value]
15 | #define DE(...) 0
| ^
meetings.cpp:88:3: note: in expansion of macro 'DE'
88 | DE(a, b);
| ^~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
0 ms |
364 KB |
Output is correct |
8 |
Correct |
0 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
0 ms |
364 KB |
Output is correct |
8 |
Correct |
0 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
14 |
Correct |
1 ms |
364 KB |
Output is correct |
15 |
Correct |
1 ms |
364 KB |
Output is correct |
16 |
Correct |
1 ms |
364 KB |
Output is correct |
17 |
Correct |
1 ms |
364 KB |
Output is correct |
18 |
Correct |
1 ms |
364 KB |
Output is correct |
19 |
Correct |
1 ms |
364 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
1 ms |
364 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
1 ms |
364 KB |
Output is correct |
24 |
Correct |
1 ms |
364 KB |
Output is correct |
25 |
Correct |
1 ms |
364 KB |
Output is correct |
26 |
Correct |
1 ms |
364 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
364 KB |
Output is correct |
2 |
Correct |
1 ms |
364 KB |
Output is correct |
3 |
Correct |
1 ms |
364 KB |
Output is correct |
4 |
Correct |
1 ms |
364 KB |
Output is correct |
5 |
Correct |
1 ms |
364 KB |
Output is correct |
6 |
Correct |
1 ms |
364 KB |
Output is correct |
7 |
Correct |
0 ms |
364 KB |
Output is correct |
8 |
Correct |
0 ms |
364 KB |
Output is correct |
9 |
Correct |
1 ms |
364 KB |
Output is correct |
10 |
Correct |
1 ms |
364 KB |
Output is correct |
11 |
Correct |
1 ms |
364 KB |
Output is correct |
12 |
Correct |
1 ms |
364 KB |
Output is correct |
13 |
Correct |
1 ms |
364 KB |
Output is correct |
14 |
Correct |
1 ms |
364 KB |
Output is correct |
15 |
Correct |
1 ms |
364 KB |
Output is correct |
16 |
Correct |
1 ms |
364 KB |
Output is correct |
17 |
Correct |
1 ms |
364 KB |
Output is correct |
18 |
Correct |
1 ms |
364 KB |
Output is correct |
19 |
Correct |
1 ms |
364 KB |
Output is correct |
20 |
Correct |
1 ms |
364 KB |
Output is correct |
21 |
Correct |
1 ms |
364 KB |
Output is correct |
22 |
Correct |
1 ms |
364 KB |
Output is correct |
23 |
Correct |
1 ms |
364 KB |
Output is correct |
24 |
Correct |
1 ms |
364 KB |
Output is correct |
25 |
Correct |
1 ms |
364 KB |
Output is correct |
26 |
Correct |
1 ms |
364 KB |
Output is correct |
27 |
Correct |
7 ms |
640 KB |
Output is correct |
28 |
Correct |
8 ms |
492 KB |
Output is correct |
29 |
Correct |
7 ms |
492 KB |
Output is correct |
30 |
Correct |
6 ms |
492 KB |
Output is correct |
31 |
Correct |
5 ms |
492 KB |
Output is correct |
32 |
Correct |
6 ms |
492 KB |
Output is correct |
33 |
Correct |
9 ms |
492 KB |
Output is correct |
34 |
Correct |
10 ms |
492 KB |
Output is correct |
35 |
Correct |
10 ms |
492 KB |
Output is correct |
36 |
Correct |
8 ms |
492 KB |
Output is correct |
37 |
Correct |
10 ms |
492 KB |
Output is correct |
38 |
Correct |
8 ms |
492 KB |
Output is correct |
39 |
Correct |
7 ms |
492 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
509 ms |
748 KB |
Output is correct |
2 |
Correct |
441 ms |
652 KB |
Output is correct |
3 |
Correct |
414 ms |
748 KB |
Output is correct |
4 |
Correct |
451 ms |
748 KB |
Output is correct |
5 |
Correct |
338 ms |
748 KB |
Output is correct |
6 |
Correct |
329 ms |
772 KB |
Output is correct |
7 |
Correct |
484 ms |
748 KB |
Output is correct |
8 |
Correct |
556 ms |
748 KB |
Output is correct |
9 |
Correct |
566 ms |
748 KB |
Output is correct |
10 |
Correct |
484 ms |
748 KB |
Output is correct |
11 |
Correct |
559 ms |
748 KB |
Output is correct |
12 |
Correct |
297 ms |
876 KB |
Output is correct |
13 |
Correct |
252 ms |
748 KB |
Output is correct |
14 |
Correct |
356 ms |
768 KB |
Output is correct |
15 |
Correct |
395 ms |
748 KB |
Output is correct |
16 |
Correct |
393 ms |
748 KB |
Output is correct |
17 |
Correct |
528 ms |
724 KB |
Output is correct |
18 |
Correct |
321 ms |
828 KB |
Output is correct |
19 |
Correct |
352 ms |
748 KB |
Output is correct |
20 |
Correct |
373 ms |
748 KB |
Output is correct |
21 |
Correct |
440 ms |
748 KB |
Output is correct |
22 |
Correct |
519 ms |
916 KB |
Output is correct |
23 |
Correct |
358 ms |
748 KB |
Output is correct |
24 |
Correct |
414 ms |
748 KB |
Output is correct |
25 |
Correct |
390 ms |
748 KB |
Output is correct |
26 |
Correct |
423 ms |
748 KB |
Output is correct |
27 |
Correct |
359 ms |
748 KB |
Output is correct |
28 |
Correct |
584 ms |
876 KB |
Output is correct |
29 |
Correct |
590 ms |
748 KB |
Output is correct |
30 |
Correct |
518 ms |
876 KB |
Output is correct |
31 |
Correct |
590 ms |
876 KB |
Output is correct |
32 |
Correct |
911 ms |
1260 KB |
Output is correct |
33 |
Correct |
349 ms |
1004 KB |
Output is correct |
34 |
Correct |
6 ms |
492 KB |
Output is correct |
35 |
Correct |
7 ms |
492 KB |
Output is correct |
36 |
Correct |
7 ms |
492 KB |
Output is correct |
37 |
Correct |
6 ms |
492 KB |
Output is correct |
38 |
Correct |
5 ms |
492 KB |
Output is correct |
39 |
Correct |
6 ms |
492 KB |
Output is correct |
40 |
Correct |
9 ms |
492 KB |
Output is correct |
41 |
Correct |
10 ms |
492 KB |
Output is correct |
42 |
Correct |
10 ms |
492 KB |
Output is correct |
43 |
Correct |
6 ms |
492 KB |
Output is correct |
44 |
Correct |
11 ms |
492 KB |
Output is correct |
45 |
Correct |
8 ms |
492 KB |
Output is correct |
46 |
Correct |
8 ms |
492 KB |
Output is correct |
47 |
Correct |
1 ms |
364 KB |
Output is correct |
48 |
Correct |
1 ms |
364 KB |
Output is correct |
49 |
Correct |
1 ms |
364 KB |
Output is correct |
50 |
Correct |
1 ms |
364 KB |
Output is correct |
51 |
Correct |
1 ms |
364 KB |
Output is correct |
52 |
Correct |
1 ms |
364 KB |
Output is correct |
53 |
Correct |
1 ms |
364 KB |
Output is correct |
54 |
Correct |
1 ms |
364 KB |
Output is correct |
55 |
Correct |
1 ms |
364 KB |
Output is correct |
56 |
Correct |
1 ms |
364 KB |
Output is correct |
57 |
Correct |
1 ms |
364 KB |
Output is correct |
58 |
Correct |
1 ms |
364 KB |
Output is correct |
59 |
Correct |
1 ms |
364 KB |
Output is correct |
60 |
Correct |
0 ms |
364 KB |
Output is correct |
61 |
Correct |
0 ms |
364 KB |
Output is correct |
62 |
Correct |
0 ms |
364 KB |
Output is correct |
63 |
Correct |
1 ms |
364 KB |
Output is correct |
64 |
Correct |
0 ms |
364 KB |
Output is correct |
65 |
Correct |
1 ms |
364 KB |
Output is correct |
66 |
Correct |
1 ms |
364 KB |
Output is correct |
67 |
Correct |
1 ms |
364 KB |
Output is correct |
68 |
Correct |
1 ms |
364 KB |
Output is correct |
69 |
Correct |
1 ms |
492 KB |
Output is correct |
70 |
Correct |
1 ms |
364 KB |
Output is correct |
71 |
Correct |
1 ms |
364 KB |
Output is correct |
72 |
Correct |
1 ms |
384 KB |
Output is correct |