Submission #952618

#	Time	Username	Problem	Language	Result	Execution time	Memory
952618		arbuzick	Garden (JOI23_garden)	C++17	100 / 100	793 ms	7256 KiB

garden

#include <bits/stdc++.h>

using namespace std;

void solve() {
    int n, m, d;
    cin >> n >> m >> d;
    vector<int> p(n), q(n);
    for (int i = 0; i < n; ++i) {
        cin >> p[i] >> q[i];
    }
    vector<int> r(m), s(m);
    for (int i = 0; i < m; ++i) {
        cin >> r[i] >> s[i];
    }
    int ans = d * d;
    vector<int> pp = p;
    sort(pp.begin(), pp.end());
    vector<int> inds(m);
    iota(inds.begin(), inds.end(), 0);
    sort(inds.begin(), inds.end(), [&](int i, int j) {
        int ri = r[i] + 1, rj = r[j] + 1;
        return ri < rj;
    });
    vector<int> ll_val(d, -1), rr_val(d, d);
    set<int> used;
    vector<int> cnt_val(d);
    for (int i = 0; i < n; ++i) {
        cnt_val[q[i]]++;
        if (cnt_val[q[i]] == 1) {
            auto it = used.lower_bound(q[i]);
            if (it != used.end()) {
                ll_val[*it] = q[i];
                rr_val[q[i]] = *it;
            }
            if (it != used.begin()) {
                it--;
                rr_val[*it] = q[i];
                ll_val[q[i]] = *it;
            }
            used.insert(q[i]);
        }
    }
    for (int i = 0; i < m; ++i) {
        cnt_val[s[i]]++;
        if (cnt_val[s[i]] == 1) {
            auto it = used.lower_bound(s[i]);
            if (it != used.end()) {
                ll_val[*it] = s[i];
                rr_val[s[i]] = *it;
            }
            if (it != used.begin()) {
                it--;
                rr_val[*it] = s[i];
                ll_val[s[i]] = *it;
            }
            used.insert(s[i]);
        }
    }
    vector<int> cnt_nw(d), inds_nw;
    for (int i = 0; i < m; ++i) {
        cnt_nw[s[inds[i]]]++;
        if (cnt_nw[s[inds[i]]] == cnt_val[s[inds[i]]]) {
            inds_nw.push_back(i);
        }
    }
    int pos = 0;
    for (int lx = 0; lx < d; ++lx) {
        int rx = pp[n - 1] + 1;
        int pos_nw = lower_bound(pp.begin(), pp.end(), lx) - pp.begin();
        if (pos_nw != 0) {
            pos_nw--;
            rx = max(rx, pp[pos_nw] + d + 1);
        }
        auto ll = ll_val, rr = rr_val, cnt = cnt_val;
        int len_pr = 0, len_suff = 0, mx_diff = 0;
        for (int i = 0; i < d; ++i) {
            if (cnt[i] > 0) {
                if (ll[i] == -1) {
                    len_pr = max(len_pr, i);
                } else {
                    mx_diff = max(mx_diff, i - ll[i] - 1);
                }
                if (rr[i] == d) {
                    len_suff = max(len_suff, d - i - 1);
                }
            }
        }

        for (auto i : inds_nw) {
            ans = min(ans, (rx - lx) * (d - max(len_pr + len_suff, mx_diff)));
            if (lx <= r[inds[i]]) {
                rx = max(rx, r[inds[i]] + 1);
            } else {
                rx = max(rx, r[inds[i]] + d + 1);
            }
            if (ll[s[inds[i]]] != -1) {
                rr[ll[s[inds[i]]]] = rr[s[inds[i]]];
                if (rr[ll[s[inds[i]]]] == d) {
                    len_suff = max(len_suff, d - ll[s[inds[i]]] - 1);
                } else {
                    mx_diff = max(mx_diff, rr[ll[s[inds[i]]]] - ll[s[inds[i]]] - 1);
                }
            }
            if (rr[s[inds[i]]] != d) {
                ll[rr[s[inds[i]]]] = ll[s[inds[i]]];
                if (ll[rr[s[inds[i]]]] == -1) {
                    len_pr = max(len_pr, rr[s[inds[i]]]);
                }
            }
        }
        ans = min(ans, (rx - lx) * (d - max(len_pr + len_suff, mx_diff)));
        int pos2 = pos;
        vector<int> used2(d, -1);
        while (pos2 < m && r[inds[pos2]] == lx) {
            used2[s[inds[pos2]]] = pos2;
            pos2++;
        }
        vector<int> inds_nw_vl;
        vector<int> used3(d, -1);
        for (auto i : inds_nw) {
            if (used2[s[inds[i]]] != -1) {
                used3[s[inds[i]]] = used2[s[inds[i]]];
            } else {
                inds_nw_vl.push_back(i);
            }
        }
        vector<int> add;
        for (int i = 0; i < d; ++i) {
            if (used3[i] != -1) {
                add.push_back(used3[i]);
            }
        }
        sort(add.begin(), add.end());
        for (auto vl : add) {
            inds_nw_vl.push_back(vl);
        }
        inds_nw = inds_nw_vl;
        pos = pos2;
    }
    cout << ans << '\n';
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}

• Subtask 1: 15 / 15
• Subtask 2: 6 / 6
• Subtask 3: 8 / 8
• Subtask 4: 16 / 16
• Subtask 5: 30 / 30
• Subtask 6: 25 / 25