Submission #139282

#	Time	Username	Problem	Language	Result	Execution time	Memory
139282		Nnandi	Meetings (IOI18_meetings)	C++14	19 / 100	5568 ms	5292 KiB

meetings

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

typedef long long ll;
const int maxn = 750005;

vector<ll> minimum_costs(vector<int> H, vector<int> L, vector<int> R) {
	int q = L.size();
	vector<ll> ans(q);
	for(int j=0;j<q;j++) {
		ll a[maxn];
		ll b[maxn];
		stack<int> mp;
		for(int i=L[j];i<=R[j];i++) {
            while(!mp.empty() && H[mp.top()] < H[i]) {
				mp.pop();
            }
            if(mp.empty()) {
				a[i] = (ll)(i - L[j] + 1) * (ll)H[i];
            }
            else {
                a[i] = (ll)(i - mp.top()) * (ll)H[i] + a[mp.top()];
            }
            mp.push(i);
		}
		while(!mp.empty()) {
			mp.pop();
		}
		for(int i=R[j];i>=L[j];i--) {
            while(!mp.empty() && H[mp.top()] < H[i]) {
				mp.pop();
            }
            if(mp.empty()) {
				b[i] = (ll)(R[j] - i + 1) * (ll)H[i];
            }
            else {
                b[i] = (ll)(mp.top() - i) * (ll)H[i] + b[mp.top()];
            }
            mp.push(i);
		}
		ans[j] = a[L[j]] + b[L[j]] - H[L[j]];
		for(int i=L[j];i<=R[j];i++) {
			if(ans[j] > a[i] + b[i] - H[i]) {
				ans[j] = a[i] + b[i] - H[i];
			}
		}
	}
	return ans;
}

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