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Submission #569159

# Submission time Handle Problem Language Result Execution time Memory
569159 2022-05-26T20:13:58 Z sidon Railway Trip 2 (JOI22_ho_t4) C++17
100 / 100
 566 ms 39184 KB 
#include <bits/stdc++.h>
using namespace std;

const int Z = 1e5, B = 17;

int N, K, M;

struct ST {
	int a[2*Z] {}, minQry = 0;
	void update(int i, int v) {
		i += N;
		a[i] = max(a[i], minQry ? Z-v : v);
	}
	void build() {
		for(int i = N; --i; ) a[i] = max(a[2*i], a[2*i+1]);
	}
	int query(int l, int r) {
		int x {};
		for(l += N, r += N + 1; l < r; l /= 2, r /= 2) {
			if(l & 1) x = max(x, a[l++]);
			if(r & 1) x = max(x, a[--r]);
		}
		return minQry ? Z-x : x;
	}
	int operator[](int i) {
		return minQry ? Z - a[i + N] : a[i + N];
	}
} s[2][B];

int main() {
	ios::sync_with_stdio(0), cin.tie(0);
	cin >> N >> K >> M;

	priority_queue<array<int, 2>> q[2];
	vector<array<int, 2>> g[2][N];

	while(M--) {
		int l, r; cin >> l >> r;
		--l, --r;

		if(l < r)
			g[1][l].push_back({r, min(l + K - 1, r)});
		else
			g[0][max(l - K + 1, r)].push_back({-r, l});
	}

	for(int i = 0; i < B; ++i)
		s[0][i].minQry = 1;

	for(int i = 0; i < N; ++i) {
		for(int j : {0, 1}) {
			for(auto k : g[j][i]) q[j].push(k);
			while(!empty(q[j]) && q[j].top()[1] < i) q[j].pop();

			s[j][0].update(i, empty(q[j]) ? i : (j ? 1 : -1) * q[j].top()[0]);
		}
	}

	for(int j : {0, 1}) s[j][0].build();

	for(int k = 0; k + 1 < B; ++k) {
		for(int j : {0, 1}) {
			for(int i = 0; i < N; ++i)
				s[j][k + 1].update(i, s[j][k].query(s[0][k][i], s[1][k][i]));
			s[j][k + 1].build();
		}
	}

	cin >> M;
	while(M--) {
		int l, t; cin >> l >> t;
		--l, --t;
		int r = l, x {};

		for(int i = B; i--; ) {
			int sl = s[0][i].query(l, r);
			int sr = s[1][i].query(l, r);
			if(sl > t || t > sr) {
				l = sl, r = sr;
				x |= 1<<i;
			}
		}
		cout << (++x > N ? -1 : x) << '\n';
	}
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 7 ms 1136 KB Output is correct
14 Correct 6 ms 1108 KB Output is correct
15 Correct 3 ms 1092 KB Output is correct
16 Correct 5 ms 1108 KB Output is correct
17 Correct 4 ms 1108 KB Output is correct
18 Correct 3 ms 1108 KB Output is correct
19 Correct 4 ms 1108 KB Output is correct
20 Correct 4 ms 1108 KB Output is correct
21 Correct 3 ms 1108 KB Output is correct
22 Correct 4 ms 1108 KB Output is correct
23 Correct 5 ms 1108 KB Output is correct
24 Correct 5 ms 1256 KB Output is correct

Subtask #3
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 237 ms 34508 KB Output is correct
2 Correct 241 ms 34452 KB Output is correct
3 Correct 291 ms 35192 KB Output is correct
4 Correct 218 ms 34248 KB Output is correct
5 Correct 233 ms 36772 KB Output is correct
6 Correct 208 ms 38708 KB Output is correct
7 Correct 199 ms 37256 KB Output is correct
8 Correct 170 ms 34804 KB Output is correct
9 Correct 163 ms 34848 KB Output is correct
10 Correct 213 ms 36732 KB Output is correct
11 Correct 236 ms 36740 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 281 ms 35048 KB Output is correct
2 Correct 284 ms 36696 KB Output is correct
3 Correct 397 ms 35596 KB Output is correct
4 Correct 217 ms 37340 KB Output is correct
5 Correct 225 ms 37200 KB Output is correct
6 Correct 233 ms 37480 KB Output is correct
7 Correct 296 ms 36364 KB Output is correct
8 Correct 378 ms 36960 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 497 ms 36816 KB Output is correct
2 Correct 405 ms 35884 KB Output is correct
3 Correct 396 ms 33996 KB Output is correct
4 Correct 398 ms 32724 KB Output is correct
5 Correct 218 ms 31904 KB Output is correct
6 Correct 395 ms 31808 KB Output is correct
7 Correct 276 ms 35768 KB Output is correct
8 Correct 2 ms 596 KB Output is correct
9 Correct 5 ms 1108 KB Output is correct
10 Correct 313 ms 36632 KB Output is correct
11 Correct 297 ms 36712 KB Output is correct
12 Correct 334 ms 36592 KB Output is correct
13 Correct 301 ms 36648 KB Output is correct
14 Correct 1 ms 596 KB Output is correct
15 Correct 7 ms 1108 KB Output is correct
16 Correct 311 ms 35088 KB Output is correct
17 Correct 451 ms 37096 KB Output is correct
18 Correct 473 ms 37172 KB Output is correct
19 Correct 460 ms 37072 KB Output is correct

Subtask #6
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 596 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Correct 1 ms 596 KB Output is correct
4 Correct 1 ms 596 KB Output is correct
5 Correct 2 ms 596 KB Output is correct
6 Correct 1 ms 596 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 1 ms 596 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 596 KB Output is correct
12 Correct 1 ms 596 KB Output is correct
13 Correct 7 ms 1136 KB Output is correct
14 Correct 6 ms 1108 KB Output is correct
15 Correct 3 ms 1092 KB Output is correct
16 Correct 5 ms 1108 KB Output is correct
17 Correct 4 ms 1108 KB Output is correct
18 Correct 3 ms 1108 KB Output is correct
19 Correct 4 ms 1108 KB Output is correct
20 Correct 4 ms 1108 KB Output is correct
21 Correct 3 ms 1108 KB Output is correct
22 Correct 4 ms 1108 KB Output is correct
23 Correct 5 ms 1108 KB Output is correct
24 Correct 5 ms 1256 KB Output is correct
25 Correct 237 ms 34508 KB Output is correct
26 Correct 241 ms 34452 KB Output is correct
27 Correct 291 ms 35192 KB Output is correct
28 Correct 218 ms 34248 KB Output is correct
29 Correct 233 ms 36772 KB Output is correct
30 Correct 208 ms 38708 KB Output is correct
31 Correct 199 ms 37256 KB Output is correct
32 Correct 170 ms 34804 KB Output is correct
33 Correct 163 ms 34848 KB Output is correct
34 Correct 213 ms 36732 KB Output is correct
35 Correct 236 ms 36740 KB Output is correct
36 Correct 281 ms 35048 KB Output is correct
37 Correct 284 ms 36696 KB Output is correct
38 Correct 397 ms 35596 KB Output is correct
39 Correct 217 ms 37340 KB Output is correct
40 Correct 225 ms 37200 KB Output is correct
41 Correct 233 ms 37480 KB Output is correct
42 Correct 296 ms 36364 KB Output is correct
43 Correct 378 ms 36960 KB Output is correct
44 Correct 497 ms 36816 KB Output is correct
45 Correct 405 ms 35884 KB Output is correct
46 Correct 396 ms 33996 KB Output is correct
47 Correct 398 ms 32724 KB Output is correct
48 Correct 218 ms 31904 KB Output is correct
49 Correct 395 ms 31808 KB Output is correct
50 Correct 276 ms 35768 KB Output is correct
51 Correct 2 ms 596 KB Output is correct
52 Correct 5 ms 1108 KB Output is correct
53 Correct 313 ms 36632 KB Output is correct
54 Correct 297 ms 36712 KB Output is correct
55 Correct 334 ms 36592 KB Output is correct
56 Correct 301 ms 36648 KB Output is correct
57 Correct 1 ms 596 KB Output is correct
58 Correct 7 ms 1108 KB Output is correct
59 Correct 311 ms 35088 KB Output is correct
60 Correct 451 ms 37096 KB Output is correct
61 Correct 473 ms 37172 KB Output is correct
62 Correct 460 ms 37072 KB Output is correct
63 Correct 427 ms 34404 KB Output is correct
64 Correct 566 ms 35144 KB Output is correct
65 Correct 421 ms 34444 KB Output is correct
66 Correct 272 ms 37172 KB Output is correct
67 Correct 443 ms 39184 KB Output is correct
68 Correct 253 ms 37204 KB Output is correct
69 Correct 225 ms 37588 KB Output is correct
70 Correct 353 ms 36280 KB Output is correct
71 Correct 387 ms 37036 KB Output is correct