Submission #935072

#	Time	Username	Problem	Language	Result	Execution time	Memory
935072		Sharky	Garden (JOI23_garden)	C++17	100 / 100	2596 ms	118912 KiB

garden

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

const int N = 500500;
const int D = 5005;

int n, m, d, p[N], q[N], x[N], y[N], cx[D], cy[D], sy[D], px[D], py[D], a[D][D];
vector<int> stupid[D];
queue<int> que[D];
int ans = 1e9, mn = 1e9;

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n >> m >> d;
    for (int i = 1; i <= n; i++) {
        cin >> p[i] >> q[i];
        cx[p[i]]++; cy[q[i]]++;   
    }
    for (int i = 0; i < d; i++) {
        int totx = 0, toty = 0;
        for (int j = i; j < i + d; j++) {
            totx += cx[j % d];
            if (totx == n) {
                px[i] = j - i + 1;
                break;
            }
        }
        for (int j = i; j < i + d; j++) {
            toty += cy[j % d];
            if (toty == n) {
                py[i] = j - i + 1;
				mn = min(mn, py[i]);
                break;
            }
        }
    }
    // for (int i = 0; i < d; i++) cout << py[i] << ' ';
    // cout << '\n';
    for (int i = 1; i <= m; i++) {
        cin >> x[i] >> y[i]; // long
        sy[y[i]]++;
		if (x[i] < d - 1) x[i] += d;
        stupid[y[i]].push_back(x[i]);
    }
    for (int i = 0; i < d; i++) {
        sort(stupid[i].begin(), stupid[i].end());
        stupid[i].erase(unique(stupid[i].begin(), stupid[i].end()), stupid[i].end());
		reverse(stupid[i].begin(), stupid[i].end());
        for (auto& stu : stupid[i]) {
			que[i].push(stu);
		}
		// cout << '\n';
    }
    for (int i = 0; i < d; i++) for (int j = 0; j < d; j++) a[i][j] = d;
    for (int i = 0; i < d; i++) {
        int tim = d, j = i;
        while (tim--) {
            j++;
            if (j >= d) j -= d;
            int di = i + d - j + 1;
            if (i >= j) di = i - j + 1;
            a[j][i] = min(a[((j - 1) % d + d) % d][i], max(py[j], di));
			if (j == i) {
				a[i][i] = d;
				for (int k = 0; k < d; k++) {
					di = i + d - k + 1;
					if (i >= k) di = i - k + 1;
					// cout << py[k] << ' ' << di << ' ' << k << ' ' << i << ' ' << '\n';
					a[i][i] = min(a[i][i], max(py[k], di));
				}
			}
            // cout << j << ' ' << i << ' ' << a[j][i] << '\n';
        }
    }
    for (int i = d - 1; i >= 0; i--) {
        vector<vector<int>> cnt(d * 2);
        vector<int> ll(d, 0), rr(d, 0), hv;
        int len = d, cc = 0;
        for (int j = 0; j < d; j++) if (!que[j].empty() && que[j].front() >= 0) {
			cnt[que[j].front()].push_back(j);
			// cout << "cnt: " << que[j].front() << ' ' << j << '\n';
		}
        // for (int j = 0; j < (d << 1); j++) {
            // cout << "pt " << j << '\n';
            // for (auto& xx : cnt[j]) cout << xx << ' ';
            // cout << '\n';
        // }
        for (int j = 0; j < d; j++) if (sy[j]) cc++, hv.push_back(j);
        for (int j = 0; j < (int) hv.size(); j++) {
            int k = (j + 1) % (int) hv.size();
            rr[hv[j]] = hv[k]; ll[hv[k]] = hv[j];
			// if (hv[k] == hv[j]) continue;
            len = min(len, a[hv[k]][hv[j]]);
        }
        // cout << len << '\n';
        int lb = i + px[i] - 1, deled = 0;
        // cout << "new\n";
        for (int j = i; j <= i + d - 1; j++) {
            // cout << "testing: " << i << ' ' << j << '\n';
            for (auto& ys : cnt[j]) {
                int L = ll[ys], R = rr[ys];
                ll[R] = L; rr[L] = R;
				// cout  << R << ' ' << L << '\n';
                len = min(len, a[R][L]);
				deled++;
				if (deled >= cc) len = mn;
                // cout << "del: " << ys << '\n';
                // cout << "len: " << len << '\n';
                // ans = min(ans, (max(lb, j) - i + 1) * len);
                // if (j >= lb) cout << i << ' ' << j << ' ' << max(lb, j) - i + 1 << ' ' << len << '\n';
            }
            ans = min(ans, (max(lb, j) - i + 1) * len);
			// cout << len << '\n';
			// cout << ans << '\n';
        }
        for (int j = 0; j < d; j++) {
            while (!que[j].empty() && que[j].front() >= i + d - 1) {
				int t = que[j].front();
                que[j].pop();
                que[j].push(t - d);
            }
        }
    }
    cout << ans << '\n';
}

/*
4 1 5
1 4
4 1
1 1
4 4
0 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