oj.uz

Submission #804827

# Submission time Handle Problem Language Result Execution time Memory
804827 2023-08-03T11:29:29 Z flappybird Cultivation (JOI17_cultivation) C++17
65 / 100
 2000 ms 5988 KB 
#include <bits/stdc++.h>
#include <cassert>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
#define MAX 660
#define MAXS 20
#define INF 20000000000020
#define bb ' '
#define ln '\n'
#define Ln '\n'
#define MOD 1000000007
ll H, W;
int N;
pll arr[MAX];
ll ans = INF;
int st[MAX * 2], en[MAX * 2];
ll U[MAX], D[MAX], UD[MAX];
ll A[MAX][MAX], B[MAX][MAX], C[MAX][MAX];
typedef pair<ll, int> pli;
deque<pli> up, down, su;
ll ys[MAX * 2];
bool test(ll d) {
	if (d <= 0) return false;
	int i, j;
	int p1, p2;
	p1 = p2 = 1;
	int X = 0;
	while (p1 <= N || p2 <= N) {
		ll x;
		if (p1 > N) x = arr[p2].second + d;
		else if (p2 > N) x = arr[p1].second;
		else x = min(arr[p1].second, arr[p2].second + d);
		ys[X++] = x;
		while (p1 <= N && arr[p1].second == x) p1++;
		while (p2 <= N && arr[p2].second + d == x) p2++;
	}
	for (i = 0; i < X; i++) U[i] = D[i] = UD[i] = 0, st[i] = en[i] = 0;
	for (i = 1; i <= N; i++) {
		int l, r;
		l = lower_bound(ys, ys + X, arr[i].second) - ys;
		r = lower_bound(ys, ys + X, arr[i].second + d) - ys;
		st[l]++;
		en[r]++;
	}
	int il, ir;
	il = ir = 0;
	for (i = 0; i < X; i++) {
		ir += st[i];
		il += en[i];
		if (il == ir) {
			UD[i] = INF;
			continue;
		}
		U[i] = A[il + 1][ir];
		D[i] = B[il + 1][ir];
		UD[i] = C[il + 1][ir];
	}
	up.clear();
	down.clear();
	su.clear();
	ll mn = INF;
	j = 0;
	for (i = 0; i < X - 1; i++) {
		while (up.size() && up.back().first <= U[i]) up.pop_back();
		up.emplace_back(U[i], i);
		while (down.size() && down.back().first <= D[i]) down.pop_back();
		down.emplace_back(D[i], i);
		while (su.size() && su.back().first <= UD[i]) su.pop_back();
		su.emplace_back(UD[i], i);
		while (j + 1 <= i && ys[i + 1] - ys[j + 1] >= W) j++;
		while (up.size() && up.front().second < j) up.pop_front();
		while (down.size() && down.front().second < j) down.pop_front();
		while (su.size() && su.front().second < j) su.pop_front();
		if (ys[i + 1] - ys[j] >= W) mn = min(mn, max(0ll + up.front().first + down.front().first, (ll)su.front().first));
	}
	if (mn >= INF) return false;
	ans = min(ans, mn + d - 1);
	return true;
}
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	cin >> H >> W >> N;
	int i, j, k;
	vector<ll> ls;
	ls.push_back(W);
	for (i = 1; i <= N; i++) cin >> arr[i].first >> arr[i].second;
	for (i = 1; i <= N; i++) {
		for (j = i + 1; j <= N; j++) ls.push_back(W - abs(arr[j].second - arr[i].second));
		for (j = i + 1; j <= N; j++) ls.push_back(abs(arr[j].second - arr[i].second));
		for (j = i + 1; j <= N; j++) ls.push_back(abs(arr[j].second - arr[i].second) + W);
		ls.push_back(arr[i].second);
		ls.push_back(arr[i].second + 1);
		ls.push_back(W - arr[i].second);
		ls.push_back(W - arr[i].second + 1);
	}
	sort(arr + 1, arr + N + 1, [&](pii p1, pii p2) {return p1.second < p2.second; });
	for (i = 1; i <= N; i++) {
		vector<ll> v;
		A[i][i] = arr[i].first - 1;
		B[i][i] = H - arr[i].first;
		v.push_back(arr[i].first);
		for (j = i + 1; j <= N; j++) {
			v.insert(lower_bound(v.begin(), v.end(), arr[j].first), arr[j].first);
			for (k = 0; k + 1 < v.size(); k++) C[i][j] = max(C[i][j], v[k + 1] - v[k] - 1);
			A[i][j] = v[0] - 1;
			B[i][j] = H - v.back();
		}
	}
	sort(ls.begin(), ls.end());
	ls.erase(unique(ls.begin(), ls.end()), ls.end());
	reverse(ls.begin(), ls.end());
	for (auto v : ls) if (!test(v)) break;
	cout << ans << ln;
}

Compilation message

cultivation.cpp: In function 'int main()':
cultivation.cpp:110:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  110 |    for (k = 0; k + 1 < v.size(); k++) C[i][j] = max(C[i][j], v[k + 1] - v[k] - 1);
      |                ~~~~~~^~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 1236 KB Output is correct
19 Correct 1 ms 852 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 1 ms 980 KB Output is correct
22 Correct 3 ms 2264 KB Output is correct
23 Correct 1 ms 724 KB Output is correct
24 Correct 7 ms 3792 KB Output is correct
25 Correct 4 ms 2768 KB Output is correct
26 Correct 15 ms 5960 KB Output is correct
27 Correct 15 ms 5988 KB Output is correct
28 Correct 7 ms 3772 KB Output is correct
29 Correct 14 ms 5960 KB Output is correct
30 Correct 15 ms 5972 KB Output is correct
31 Correct 15 ms 5960 KB Output is correct
32 Correct 15 ms 5900 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 1236 KB Output is correct
19 Correct 1 ms 852 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 1 ms 980 KB Output is correct
22 Correct 3 ms 2264 KB Output is correct
23 Correct 1 ms 724 KB Output is correct
24 Correct 7 ms 3792 KB Output is correct
25 Correct 4 ms 2768 KB Output is correct
26 Correct 15 ms 5960 KB Output is correct
27 Correct 15 ms 5988 KB Output is correct
28 Correct 7 ms 3772 KB Output is correct
29 Correct 14 ms 5960 KB Output is correct
30 Correct 15 ms 5972 KB Output is correct
31 Correct 15 ms 5960 KB Output is correct
32 Correct 15 ms 5900 KB Output is correct
33 Execution timed out 2056 ms 5924 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 3 ms 596 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 3 ms 596 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 4 ms 596 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 4 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 3 ms 596 KB Output is correct
18 Correct 2 ms 596 KB Output is correct
19 Correct 4 ms 600 KB Output is correct
20 Correct 2 ms 596 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 468 KB Output is correct
2 Correct 2 ms 592 KB Output is correct
3 Correct 3 ms 596 KB Output is correct
4 Correct 3 ms 596 KB Output is correct
5 Correct 3 ms 596 KB Output is correct
6 Correct 1 ms 592 KB Output is correct
7 Correct 2 ms 596 KB Output is correct
8 Correct 2 ms 592 KB Output is correct
9 Correct 2 ms 596 KB Output is correct
10 Correct 4 ms 596 KB Output is correct
11 Correct 3 ms 596 KB Output is correct
12 Correct 4 ms 596 KB Output is correct
13 Correct 1 ms 596 KB Output is correct
14 Correct 2 ms 596 KB Output is correct
15 Correct 2 ms 600 KB Output is correct
16 Correct 2 ms 596 KB Output is correct
17 Correct 3 ms 596 KB Output is correct
18 Correct 2 ms 596 KB Output is correct
19 Correct 4 ms 600 KB Output is correct
20 Correct 2 ms 596 KB Output is correct
21 Correct 105 ms 1932 KB Output is correct
22 Correct 135 ms 1876 KB Output is correct
23 Correct 91 ms 1936 KB Output is correct
24 Correct 100 ms 1876 KB Output is correct
25 Correct 141 ms 1876 KB Output is correct
26 Correct 36 ms 1932 KB Output is correct
27 Correct 138 ms 1936 KB Output is correct
28 Correct 146 ms 1932 KB Output is correct
29 Correct 201 ms 1936 KB Output is correct
30 Correct 148 ms 1876 KB Output is correct
31 Correct 160 ms 1936 KB Output is correct
32 Correct 135 ms 1936 KB Output is correct
33 Correct 150 ms 1936 KB Output is correct
34 Correct 94 ms 1936 KB Output is correct
35 Correct 105 ms 1876 KB Output is correct
36 Correct 152 ms 1936 KB Output is correct

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 468 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 0 ms 336 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 596 KB Output is correct
18 Correct 1 ms 1236 KB Output is correct
19 Correct 1 ms 852 KB Output is correct
20 Correct 1 ms 596 KB Output is correct
21 Correct 1 ms 980 KB Output is correct
22 Correct 3 ms 2264 KB Output is correct
23 Correct 1 ms 724 KB Output is correct
24 Correct 7 ms 3792 KB Output is correct
25 Correct 4 ms 2768 KB Output is correct
26 Correct 15 ms 5960 KB Output is correct
27 Correct 15 ms 5988 KB Output is correct
28 Correct 7 ms 3772 KB Output is correct
29 Correct 14 ms 5960 KB Output is correct
30 Correct 15 ms 5972 KB Output is correct
31 Correct 15 ms 5960 KB Output is correct
32 Correct 15 ms 5900 KB Output is correct
33 Execution timed out 2056 ms 5924 KB Time limit exceeded
34 Halted 0 ms 0 KB -