Submission #639680

#	Time	Username	Problem	Language	Result	Execution time	Memory
639680		classic	Cover (COCI18_cover)	C++14	120 / 120	77 ms	408 KiB

cover

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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<pair<int, int>> pa;
    for (int i = 0; i < n; i++) {
        int x, y;
        cin >> x >> y;
        pa.emplace_back(abs(x), abs(y));
    }
    vector<pair<int, int>> pb;
    for (int i = 0; i < n; i++) {
        bool ok = true;
        for (int j = 0; j < n; j++) {
            if (pa[j].first > pa[i].first && pa[j].second > pa[i].second) {
                ok = false;
            }
        }
        if (ok) {
            pb.emplace_back(pa[i]);
        }
    }
    sort(pb.begin(), pb.end());
    int m = pb.size();
    vector<long long> dp(m + 1, 1e18);
    dp[0] = 0;
    for (int i = 0; i < m; i++) {
        int mxy = 0;
        for (int j = i; j >= 0; j--) {
            mxy = max(mxy, pb[j].second);
            dp[i + 1] = min(dp[i + 1], dp[j] + 1LL * pb[i].first * mxy);
        }
    }
    cout << dp[m] * 4;
    return 0;
}

• Subtask 1: 120 / 120