Submission #1211321

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211321		SpyrosAliv	Meetings (IOI18_meetings)	C++20	19 / 100	5591 ms	4444 KiB

meetings

#include <bits/stdc++.h>
using namespace std;
#define ll long long

vector<ll> minimum_costs(vector<int> h, vector<int> L, vector<int> R) {
    int n = h.size();
    int q = L.size();
    vector<ll> ans;
    for (int curr = 0; curr < q; curr++) {
        int l = L[curr];
        int r = R[curr];
        vector<ll> dpl(n, 0), dpr(n, 0);
        stack<pair<int, int>> st;
        for (int i = l; i <= r; i++) {
            int cov = 1;
            while (!st.empty() && h[st.top().first] <= h[i]) {
                cov += st.top().second;
                st.pop();
            }
            dpl[i] = (ll)cov * (ll)h[i];
            if (!st.empty()) dpl[i] += dpl[st.top().first];
            st.push({i, cov});
        }
        while (!st.empty()) st.pop();
        for (int i = r; i >= l; i--) {
            int cov = 1;
            while (!st.empty() && h[st.top().first] <= h[i]) {
                cov += st.top().second;
                st.pop();
            }
            dpr[i] = (ll)cov * (ll)h[i];
            if (!st.empty()) dpr[i] += dpr[st.top().first];
            st.push({i, cov});
        }
        ll fin = dpl[l] + dpr[l];
        for (int i = l; i <= r; i++) fin = min(fin, dpl[i] + dpr[i] - (ll)h[i]);
        ans.push_back(fin);
    }
    return ans;
}

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