제출 #958025

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
958025	2024-04-04 16:56:59	Soumya1	Long Distance Coach (JOI17_coach)	C++17	100 / 100	128 ms	27184 KiB

coach

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll inf = 1e18;
struct Line {
  mutable ll k, m, p;
  bool operator<(const Line& o) const { return k < o.k; }
  bool operator<(ll x) const { return p < x; }
};
struct LineContainer : multiset<Line, less<>> {
  // (for doubles, use inf = 1/.0, div(a,b) = a/b)
  static const ll inf = LLONG_MAX;
  ll div(ll a, ll b) { // floored division
    return a / b - ((a ^ b) < 0 && a % b); }
  bool isect(iterator x, iterator y) {
    if (y == end()) return x->p = inf, 0;
    if (x->k == y->k) x->p = x->m > y->m ? inf : -inf;
    else x->p = div(y->m - x->m, x->k - y->k);
    return x->p >= y->p;
  }
  void add(ll k, ll m) {
    auto z = insert({k, m, 0}), y = z++, x = y;
    while (isect(y, z)) z = erase(z);
    if (x != begin() && isect(--x, y)) isect(x, y = erase(y));
    while ((y = x) != begin() && (--x)->p >= y->p)
      isect(x, erase(y));
  }
  ll query(ll x) {
    assert(!empty());
 
 
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• Subtask 2: 30 / 30
• Subtask 3: 25 / 25
• Subtask 4: 29 / 29