Submission #240932

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
240932	2020-06-21 14:14:16	kimbj0709	Building Bridges (CEOI17_building)	C++14	100 / 100	109 ms	16168 KiB

building

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#include <bits/stdc++.h>
using namespace std;
#define int long long
#define maxn 100050
vector<int> vect3;
struct Line {
  int m, b;
  int operator()(int x) { return m * x + b; }
} a[maxn*4];
void insert(int l, int r, Line seg, int o) {
  if(l==r) {
    if(seg(vect3[l]) > a[o](vect3[l])) a[o] = seg;
    return;
  }
  int mid= (l + r) >> 1, lson = o * 2 + 1, rson = o * 2 + 2;
  if(a[o].m > seg.m) swap(a[o], seg);
  if(a[o](vect3[mid]) < seg(vect3[mid])) {
    swap(a[o], seg);
    insert(l, mid, seg, lson);
  }
  else insert(mid+1, r, seg, rson);
}
int query(int l, int r, int x, int o) {
  if(l==r) return a[o](vect3[x]);
  int mid = (l + r) >> 1, lson = o * 2 + 1, rson = o * 2 + 2;
  if(x < mid) return max(a[o](vect3[x]), query(l, mid, x, lson));
  else return max(a[o](vect3[x]), query(mid+1, r, x, rson));
}
int32_t main() {
  ios::sync_with_stdio(0);
 
 
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• Subtask 1: 30 / 30
• Subtask 2: 30 / 30
• Subtask 3: 40 / 40