結果
| 問題 |
No.2796 Small Matryoshka
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-06-28 22:30:13 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,081 bytes |
| コンパイル時間 | 3,377 ms |
| コンパイル使用メモリ | 230,688 KB |
| 最終ジャッジ日時 | 2025-02-22 01:15:14 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 8 WA * 11 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define INF (int)1e18
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
//#define int long long
mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());
void Solve()
{
int n; cin >> n;
vector <pair<int, int>> a(n);
for (auto &x : a){
cin >> x.second >> x.first;
}
ordered_set os;
for (auto x : a){
os.insert(x.second);
}
sort(a.begin(), a.end());
int ans = 0;
for (int i = 0; i < n; i++){
int l = 0, r = n;
// everyone from l + 1 to i will not be able to interact with you
// some additional > i elements may not be able to interact as well
// who are they?
// people with minimum < a[i].first
while (l != r){
int mid = (l + r + 1) / 2;
if (a[i].second >= a[mid].first){
l = mid;
} else {
r = mid - 1;
}
}
if (l == 0 && a[i].second < a[0].first){
l--;
}
int v = (i - l - 1);
os.erase(os.find(a[i].second));
// cout << v << " ";
v += os.order_of_key(a[i].first - 1);
// cout << v << "\n";
ans = max(ans, v);
}
cout << ans << "\n";
}
int32_t main()
{
auto begin = std::chrono::high_resolution_clock::now();
ios_base::sync_with_stdio(0);
cin.tie(0);
int t = 1;
// freopen("in", "r", stdin);
// freopen("out", "w", stdout);
// cin >> t;
for(int i = 1; i <= t; i++)
{
//cout << "Case #" << i << ": ";
Solve();
}
auto end = std::chrono::high_resolution_clock::now();
auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n";
return 0;
}