Submission #313127

#	Time	Username	Problem	Language	Result	Execution time	Memory
313127		reymontada61	Meetings (IOI18_meetings)	C++14	19 / 100	5598 ms	6648 KiB

meetings

#include "meetings.h"
#include <bits/stdc++.h>
using namespace std;
 
vector<int> h;
vector<long long> cost;

void addcosts(int from, int to, int update) {
	long long adder = 0;
	vector<pair<long long, int>> proc;
	proc.push_back({INT_MAX, from-update});
	for (int j=from; (from<=j && j<=to) || (to <= j && j <= from); j+=update) {
		while (proc.back().first <= h[j]) {
			long long t = proc.size();
			long long co = abs(proc[t-1].second - proc[t-2].second) * proc[t-1].first;
			adder -= co;
			proc.pop_back();
		}
		proc.push_back({h[j], j});
		long long t = proc.size();
		long long co = abs(proc[t-1].second - proc[t-2].second) * proc[t-1].first;
		adder += co;
		cost[j] += adder;
	}  
}
 
std::vector<long long> minimum_costs(std::vector<int> H, std::vector<int> L,
                                     std::vector<int> R) {
  int Q = L.size();
  std::vector<long long> C(Q);
  
  int n = H.size();
  h = H;
  cost.resize(n, 0);
  
  for (int i=0; i<Q; i++) {
	  int l = L[i], r = R[i];
	  
	  for (int j=l; j<=r; j++) {
		  cost[j] = 0;
	  }
	  
	  addcosts(l, r, 1);
	  addcosts(r, l, -1);
	  
	  for (int i=l; i<=r; i++) {
		  cost[i] -= H[i];
	  }
	  
	  C[i] = LLONG_MAX;
	  for (int j=l; j<=r; j++) {
		  C[i] = min(C[i], cost[j]);
	  }
  }
  
  return C;
  
}

• Subtask 1: 4 / 4
• Subtask 2: 15 / 15
• Subtask 3: 0 / 17
• Subtask 4: 0 / 24
• Subtask 5: 0 / 40