oj.uz

답안 #801804

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
801804 2023-08-02T07:48:14 Z GEN 이지후(#10129) Cultivation (JOI17_cultivation) C++17
80 / 100
 2000 ms 2788 KB 
#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pi = array<lint, 2>;
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(), (v).end()
const int MAXT = 1050;

vector<lint> cy;

struct node {
	int cmin, cmax, gap;
	node() {
		cmin = 2e9;
		cmax = -2e9;
		gap = 0;
	}
	node(int pos) {
		cmin = cmax = pos;
		gap = 0;
	}
	node(int fuck1, int fuck2, int fuck3) {
		cmin = fuck1;
		cmax = fuck2;
		gap = fuck3;
	}
	node operator+(const node &nd) {
		if (cmax < 0)
			return nd;
		if (nd.cmax < 0)
			return *this;
		return node(min(cmin, nd.cmin), max(cmax, nd.cmax), max({gap, nd.gap, nd.cmin - cmax - 1}));
	}
};

struct seg {
	node tree[MAXT];
	int lim;
	void init(int sz) {
		for (lim = 1; lim <= sz; lim <<= 1)
			;
		fill(tree, tree + MAXT, node());
	}
	void upd(int x, int cnt) {
		if (cnt == 0)
			tree[x + lim] = node();
		else
			tree[x + lim] = node(cy[x]);
		x += lim;
		while (x > 1) {
			x >>= 1;
			tree[x] = tree[2 * x] + tree[2 * x + 1];
		}
	}
} seg;

int cnt[696];
pi dq[3][696];
int fr[3], ed[3];

lint sumFixed(lint r, lint c, lint g, vector<pi> a) {
	vector<array<lint, 3>> e1, e2, event;
	e1.push_back({0, -1, 0});
	for (auto &[x, y] : a) {
		e1.push_back({x, y, +1});
		e2.push_back({x + 1 + g, y, -1});
	}
	e2.push_back({r + g, -1, 0});
	event.resize(sz(e1) + sz(e2));
	merge(all(e1), all(e2), event.begin());
	vector<array<lint, 5>> chop;
	memset(cnt, 0, sizeof(cnt));
	for (int i = 0; i < sz(event);) {
		int j = i;
		while (j < sz(event) && event[i][0] == event[j][0]) {
			if (event[j][2]) {
				cnt[event[j][1]] += event[j][2];
				seg.upd(event[j][1], cnt[event[j][1]]);
			}
			j++;
		}
		if (j == sz(event))
			break;
		lint lmax = seg.tree[1].cmin, rmax = c - 1 - seg.tree[1].cmax, lrmax = seg.tree[1].gap;
		chop.push_back({event[i][0], event[j][0], lmax, rmax, lrmax});
		i = j;
	}
	int k = 0;
	memset(fr, 0, sizeof(fr));
	memset(ed, 0, sizeof(ed));
	lint ans = 1e18;
	for (int i = 0; i < sz(chop); i++) {
		if (chop[i][0] > g)
			break;
		while (k < sz(chop) && chop[k][0] < chop[i][0] + r) {
			for (int t = 0; t < 3; t++) {
				pi val = {chop[k][t + 2], chop[k][1]};
				while (fr[t] < ed[t] && dq[t][ed[t] - 1][0] <= val[0])
					ed[t]--;
				dq[t][ed[t]++] = val;
			}
			k++;
		}
		lint dap[3] = {0, 0, 0};
		for (int t = 0; t < 3; t++) {
			while (fr[t] < ed[t] && dq[t][fr[t]][1] <= chop[i][0])
				fr[t]++;
			dap[t] = dq[t][fr[t]][0];
		}
		ans = min(ans, max(dap[0] + dap[1], dap[2]));
	}
	return ans;
}

map<pi, lint> mp;
// abandon
lint solve(lint r, lint c, lint dl, lint dr, vector<pi> a) {
	if (mp.count({dl, dr}))
		return mp[pi{dl, dr}];
	vector<array<lint, 3>> e1, e2, event;
	for (auto &[x, y] : a) {
		int l = max(0ll, x - dl);
		int e = min(r * 1ll, x + 1 + dr);
		e1.push_back({l, y, +1});
		e2.push_back({e, y, -1});
	}
	event.resize(sz(e1) + sz(e2));
	merge(all(e1), all(e2), event.begin());
	if (event[0][0] != 0 || event.back()[0] != r)
		return mp[pi{dl, dr}] = 1e18;

	lint lmax = 0, rmax = 0, lrmax = 0;
	multiset<lint> gap;
	memset(cnt, 0, sizeof(cnt));
	set<lint> st;
	for (int i = 0; i < sz(event);) {
		int j = i;
		while (j < sz(event) && event[i][0] == event[j][0]) {
			if (event[j][2]) {
				bool prv = (cnt[event[j][1]] > 0);
				cnt[event[j][1]] += event[j][2];
				bool cur = (cnt[event[j][1]] > 0);
				lint y = cy[event[j][1]];
				if (prv && !cur) {
					auto it = st.find(y);
					lint n = -1, p = -1;
					if (next(it) != st.end()) {
						n = *next(it);
						gap.erase(gap.find(n - y));
					}
					if (it != st.begin()) {
						p = *prev(it);
						gap.erase(gap.find(y - p));
					}
					if (~n && ~p) {
						gap.insert(n - p);
					}
					st.erase(it);
				} else if (!prv && cur) {
					auto it = st.lower_bound(y);
					lint n = -1, p = -1;
					if (it != st.end())
						n = *it;
					if (it != st.begin())
						p = *prev(it);
					if (~n && ~p)
						gap.erase(gap.find(n - p));
					if (~n)
						gap.insert(n - y);
					if (~p)
						gap.insert(y - p);
					st.insert(y);
				}
			}
			j++;
		}

		if (j == sz(event))
			break;
		if (sz(st) == 0)
			return 1e18;
		lmax = max(lmax, *st.begin());
		rmax = max(rmax, c - 1 - *st.rbegin());
		if (sz(gap))
			lrmax = max(lrmax, *gap.rbegin() - 1);
		i = j;
	}
	return mp[pi{dl, dr}] = max(lmax + rmax, lrmax);
}

// n^3 log n

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n, r, c;
	cin >> r >> c >> n;
	vector<pi> a(n);
	for (auto &[x, y] : a)
		cin >> x >> y, x--, y--;
	sort(all(a));
	lint ans = 1e18;
	vector<lint> gaps = {0};
	for (int i = 0; i < n; i++) {
		cy.push_back(a[i][1]);
		for (int j = i + 1; j < n; j++) {
			if (a[j][0] > a[i][0])
				gaps.push_back(a[j][0] - a[i][0] - 1);
		}
	}
	sort(all(cy));
	cy.resize(unique(all(cy)) - cy.begin());
	for (int i = 0; i < n; i++) {
		a[i][1] = lower_bound(all(cy), a[i][1]) - cy.begin();
	}
	seg.init(sz(cy));
	for (int i = 0; i < n; i++) {
		for (int j = n - 1; j >= 0; j--) {
			if (a[i][0] + r - 1 - a[j][0] >= ans)
				break;
			ans = min(ans, a[i][0] + r - 1 - a[j][0] + solve(r, c, a[i][0], r - 1 - a[j][0], a));
		}
	}
	sort(all(gaps));
	gaps.resize(unique(all(gaps)) - gaps.begin());
	for (auto &dy : gaps) {
		if (ans > dy)
			ans = min(ans, sumFixed(r, c, dy, a) + dy);
	}
	cout << ans << endl;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 ms 332 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 8 ms 340 KB Output is correct
22 Correct 7 ms 460 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 7 ms 724 KB Output is correct
25 Correct 7 ms 560 KB Output is correct
26 Correct 10 ms 976 KB Output is correct
27 Correct 8 ms 984 KB Output is correct
28 Correct 9 ms 724 KB Output is correct
29 Correct 5 ms 984 KB Output is correct
30 Correct 6 ms 984 KB Output is correct
31 Correct 6 ms 984 KB Output is correct
32 Correct 7 ms 984 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 ms 332 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 8 ms 340 KB Output is correct
22 Correct 7 ms 460 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 7 ms 724 KB Output is correct
25 Correct 7 ms 560 KB Output is correct
26 Correct 10 ms 976 KB Output is correct
27 Correct 8 ms 984 KB Output is correct
28 Correct 9 ms 724 KB Output is correct
29 Correct 5 ms 984 KB Output is correct
30 Correct 6 ms 984 KB Output is correct
31 Correct 6 ms 984 KB Output is correct
32 Correct 7 ms 984 KB Output is correct
33 Correct 10 ms 724 KB Output is correct
34 Correct 154 ms 984 KB Output is correct
35 Correct 244 ms 976 KB Output is correct
36 Correct 317 ms 984 KB Output is correct
37 Correct 232 ms 984 KB Output is correct
38 Correct 292 ms 984 KB Output is correct
39 Correct 288 ms 984 KB Output is correct
40 Correct 304 ms 984 KB Output is correct
41 Correct 709 ms 724 KB Output is correct
42 Correct 555 ms 984 KB Output is correct
43 Correct 292 ms 984 KB Output is correct
44 Correct 164 ms 984 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 5 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 4 ms 340 KB Output is correct
9 Correct 4 ms 340 KB Output is correct
10 Correct 5 ms 340 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 2 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 3 ms 340 KB Output is correct
16 Correct 4 ms 336 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 5 ms 364 KB Output is correct
19 Correct 4 ms 340 KB Output is correct
20 Correct 4 ms 340 KB Output is correct

Subtask #5
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 5 ms 340 KB Output is correct
5 Correct 4 ms 340 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 4 ms 340 KB Output is correct
9 Correct 4 ms 340 KB Output is correct
10 Correct 5 ms 340 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 2 ms 340 KB Output is correct
13 Correct 2 ms 340 KB Output is correct
14 Correct 2 ms 340 KB Output is correct
15 Correct 3 ms 340 KB Output is correct
16 Correct 4 ms 336 KB Output is correct
17 Correct 4 ms 340 KB Output is correct
18 Correct 5 ms 364 KB Output is correct
19 Correct 4 ms 340 KB Output is correct
20 Correct 4 ms 340 KB Output is correct
21 Correct 43 ms 460 KB Output is correct
22 Correct 100 ms 512 KB Output is correct
23 Correct 400 ms 1056 KB Output is correct
24 Correct 347 ms 996 KB Output is correct
25 Correct 112 ms 440 KB Output is correct
26 Correct 58 ms 520 KB Output is correct
27 Correct 316 ms 1000 KB Output is correct
28 Correct 108 ms 524 KB Output is correct
29 Correct 80 ms 440 KB Output is correct
30 Correct 142 ms 556 KB Output is correct
31 Correct 107 ms 480 KB Output is correct
32 Correct 105 ms 512 KB Output is correct
33 Correct 280 ms 1052 KB Output is correct
34 Correct 295 ms 880 KB Output is correct
35 Correct 299 ms 904 KB Output is correct
36 Correct 100 ms 492 KB Output is correct

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 336 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 2 ms 340 KB Output is correct
19 Correct 2 ms 332 KB Output is correct
20 Correct 1 ms 336 KB Output is correct
21 Correct 8 ms 340 KB Output is correct
22 Correct 7 ms 460 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 7 ms 724 KB Output is correct
25 Correct 7 ms 560 KB Output is correct
26 Correct 10 ms 976 KB Output is correct
27 Correct 8 ms 984 KB Output is correct
28 Correct 9 ms 724 KB Output is correct
29 Correct 5 ms 984 KB Output is correct
30 Correct 6 ms 984 KB Output is correct
31 Correct 6 ms 984 KB Output is correct
32 Correct 7 ms 984 KB Output is correct
33 Correct 10 ms 724 KB Output is correct
34 Correct 154 ms 984 KB Output is correct
35 Correct 244 ms 976 KB Output is correct
36 Correct 317 ms 984 KB Output is correct
37 Correct 232 ms 984 KB Output is correct
38 Correct 292 ms 984 KB Output is correct
39 Correct 288 ms 984 KB Output is correct
40 Correct 304 ms 984 KB Output is correct
41 Correct 709 ms 724 KB Output is correct
42 Correct 555 ms 984 KB Output is correct
43 Correct 292 ms 984 KB Output is correct
44 Correct 164 ms 984 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 3 ms 340 KB Output is correct
47 Correct 2 ms 340 KB Output is correct
48 Correct 5 ms 340 KB Output is correct
49 Correct 4 ms 340 KB Output is correct
50 Correct 2 ms 340 KB Output is correct
51 Correct 2 ms 340 KB Output is correct
52 Correct 4 ms 340 KB Output is correct
53 Correct 4 ms 340 KB Output is correct
54 Correct 5 ms 340 KB Output is correct
55 Correct 4 ms 384 KB Output is correct
56 Correct 2 ms 340 KB Output is correct
57 Correct 2 ms 340 KB Output is correct
58 Correct 2 ms 340 KB Output is correct
59 Correct 3 ms 340 KB Output is correct
60 Correct 4 ms 336 KB Output is correct
61 Correct 4 ms 340 KB Output is correct
62 Correct 5 ms 364 KB Output is correct
63 Correct 4 ms 340 KB Output is correct
64 Correct 4 ms 340 KB Output is correct
65 Correct 43 ms 460 KB Output is correct
66 Correct 100 ms 512 KB Output is correct
67 Correct 400 ms 1056 KB Output is correct
68 Correct 347 ms 996 KB Output is correct
69 Correct 112 ms 440 KB Output is correct
70 Correct 58 ms 520 KB Output is correct
71 Correct 316 ms 1000 KB Output is correct
72 Correct 108 ms 524 KB Output is correct
73 Correct 80 ms 440 KB Output is correct
74 Correct 142 ms 556 KB Output is correct
75 Correct 107 ms 480 KB Output is correct
76 Correct 105 ms 512 KB Output is correct
77 Correct 280 ms 1052 KB Output is correct
78 Correct 295 ms 880 KB Output is correct
79 Correct 299 ms 904 KB Output is correct
80 Correct 100 ms 492 KB Output is correct
81 Correct 818 ms 800 KB Output is correct
82 Correct 926 ms 896 KB Output is correct
83 Correct 674 ms 972 KB Output is correct
84 Execution timed out 2070 ms 2788 KB Time limit exceeded
85 Halted 0 ms 0 KB -