Submission #528417

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
528417	2022-02-20 09:00:01	cig32	Building Bridges (CEOI17_building)	C++17	100 / 100	111 ms	12864 KiB

building

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#include "bits/stdc++.h"
using namespace std;
mt19937_64 rng((int)std::chrono::steady_clock::now().time_since_epoch().count());
const int MAXN = 5e5 + 10;
const int MOD = 1e9 + 7;
#define int long long
 
int rnd(int x, int y) {
  int u = uniform_int_distribution<int>(x, y)(rng); return u;
}
const int is_query = -(1ll<<62);
struct Line {
  int m, b;
  mutable function<const Line*()> succ;
  bool operator<(const Line& rhs) const {
    if (rhs.b != is_query) return m < rhs.m;
    const Line* s = succ();
    if (!s) return 0;
    int x = rhs.m;
    return b - s->b < (s->m - m) * x;
  }
};
struct dynamic_hull : public multiset<Line> { // wiint maintain upper hull for maximum
  bool bad(iterator y) {
    auto z = next(y);
    if (y == begin()) {
        if (z == end()) return 0;
        return y->m == z->m && y->b <= z->b;
    }
    auto x = prev(y);
 
 
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• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40