Submission #896203

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
896203	2024-01-01 02:26:01	NeroZein	Road Construction (JOI21_road_construction)	C++17	100 / 100	1229 ms	11784 KiB

road_construction

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#include "bits/stdc++.h"
using namespace std;
#ifdef Nero
#include "Deb.h"
#else
#define deb(...)
#endif
int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, k;
  cin >> n >> k;
  vector<pair<int, int>> a(n);
  for (int i = 0; i < n; ++i) {
    int x, y;
    cin >> x >> y;
    a[i] = make_pair(x + y, y - x); // rotate 45 degress
  }
  sort(a.begin(), a.end());
  long long lo = 0, hi = 4e9;
  while (lo < hi) {
    long long mid = (lo + hi) / 2;
    int p = 0, cnt = 0;
    multiset<long long> se; 
    for (int i = 0; i < n && cnt < k; ++i) {
      auto [x, y] = a[i];
      while (p < i && (long long) x - a[p].first > mid) {
        se.erase(se.find(a[p].second));
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 7 / 7
• Subtask 4: 20 / 20
• Subtask 5: 27 / 27
• Subtask 6: 35 / 35