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Submission #943649

# Submission time Handle Problem Language Result Execution time Memory
943649 2024-03-11T17:25:45 Z MinaRagy06 Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 436 ms 48692 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define md ((l + r) >> 1)

const int N = 200'005;
vector<array<int, 2>> ask[N];
int a[N], ans[1'000'005];
struct segtree {
	int seg[1 << 19];
	int n;
	void build(int i, int l, int r) {
		if (l == r) {
			seg[i] = 0;
			return;
		}
		build(i << 1, l, md);
		build(i << 1 | 1, md + 1, r);
		seg[i] = seg[i << 1] + seg[i << 1 | 1];
	}
	void init(int _n) {
		n = _n;
		build(1, 0, n - 1);
	}
	void upd(int i, int l, int r, int p, int x) {
		if (l == r) {
			seg[i] = x;
			return;
		}
		if (p <= md) {
			upd(i << 1, l, md, p, x);
		} else {
			upd(i << 1 | 1, md + 1, r, p, x);
		}
		seg[i] = seg[i << 1] + seg[i << 1 | 1];
	}
	void upd(int i, int x) {
		upd(1, 0, n - 1, i, x);
	}
	array<int, 2> get(int i, int l, int r, int p) {
		if (l == r) {
			return {l, p};
		}
		if (p < seg[i << 1]) {
			return get(i << 1, l, md, p);
		} else {
			return get(i << 1 | 1, md + 1, r, p - seg[i << 1]);
		}
	}
	array<int, 2> get(int p) {
		return get(1, 0, n - 1, p);
	}
	int get2(int i, int l, int r, int p) {
		if (l == r) {
			return seg[i];
		}
		if (p <= md) {
			return get2(i << 1, l, md, p);
		} else {
			return get2(i << 1 | 1, md + 1, r, p);
		}
	}
	int get2(int p) {
		return get2(1, 0, n - 1, p);
	}
} seg;
int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int n, q;
	cin >> n >> q;
	int pos[n + 1];
	for (int i = 0; i < n; i++) {
		cin >> a[i];
		pos[a[i]] = i;
	}
	for (int i = 0; i < q; i++) {
		int t, p;
		cin >> t >> p;
		t = min(t, n);
		ask[t].push_back({p - 1, i});
	}
	int nxt[n]{};
	stack<int> st;
	a[n] = 1e9;
	st.push(n);
	for (int i = n - 1; i >= 0; i--) {
		while (a[i] > a[st.top()]) st.pop();
		nxt[i] = st.top();
		st.push(i);
	}
	seg.init(n + 1);
	for (int i = 0; i < n; i = nxt[i]) {
		seg.upd(a[i], nxt[i] - i);
	}
	bool isover = 0;
	for (int j = 0; j <= n; j++) {
		for (auto [p, idx] : ask[j]) {
			auto [i, v] = seg.get(p);
			ans[idx] = a[pos[i] + v];
		}
		if (isover) continue;
		int cur = n / 2;
		array<int, 2> V = seg.get(cur);
		int i = pos[V[0]];
		cur = V[1];
		if (cur == 0) {
			isover = 1;
			continue;
		}
		int mx = i + seg.get2(a[i]);
		seg.upd(a[i], cur);
		cur = i + cur;
		while (cur < n && seg.get2(a[cur]) == 0) {
			int newcur = min(nxt[cur], mx);
			seg.upd(a[cur], newcur - cur);
			cur = newcur;
		}
	}
	for (int i = 0; i < q; i++) {
		cout << ans[i] << '\n';
	}
	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 193 ms 25936 KB Output is correct
2 Correct 198 ms 24656 KB Output is correct
3 Correct 187 ms 24272 KB Output is correct
4 Correct 153 ms 24128 KB Output is correct
5 Correct 174 ms 26196 KB Output is correct
6 Correct 153 ms 26832 KB Output is correct
7 Correct 170 ms 27012 KB Output is correct
8 Correct 156 ms 25680 KB Output is correct
9 Correct 156 ms 24476 KB Output is correct
10 Correct 160 ms 24332 KB Output is correct
11 Correct 157 ms 24620 KB Output is correct
12 Correct 154 ms 22840 KB Output is correct
13 Correct 165 ms 23688 KB Output is correct
14 Correct 166 ms 25684 KB Output is correct
15 Correct 167 ms 24004 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 193 ms 23252 KB Output is correct
18 Correct 148 ms 23028 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9432 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 269 ms 27656 KB Output is correct
2 Correct 258 ms 42172 KB Output is correct
3 Correct 205 ms 36020 KB Output is correct
4 Correct 199 ms 37392 KB Output is correct
5 Correct 219 ms 36980 KB Output is correct
6 Correct 190 ms 37108 KB Output is correct
7 Correct 220 ms 41016 KB Output is correct
8 Correct 222 ms 39996 KB Output is correct
9 Correct 193 ms 37020 KB Output is correct
10 Correct 200 ms 38736 KB Output is correct
11 Correct 165 ms 34896 KB Output is correct
12 Correct 166 ms 35084 KB Output is correct
13 Correct 197 ms 38072 KB Output is correct
14 Correct 172 ms 35508 KB Output is correct
15 Correct 207 ms 39608 KB Output is correct
16 Correct 19 ms 12472 KB Output is correct
17 Correct 261 ms 36892 KB Output is correct
18 Correct 147 ms 33388 KB Output is correct
19 Correct 52 ms 19228 KB Output is correct
20 Correct 62 ms 20680 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 75 ms 15160 KB Output is correct
2 Correct 61 ms 16576 KB Output is correct
3 Correct 55 ms 16728 KB Output is correct
4 Correct 36 ms 16152 KB Output is correct
5 Correct 53 ms 16468 KB Output is correct
6 Correct 38 ms 16208 KB Output is correct
7 Correct 47 ms 16464 KB Output is correct
8 Correct 41 ms 16000 KB Output is correct
9 Correct 46 ms 16212 KB Output is correct
10 Correct 30 ms 15728 KB Output is correct
11 Correct 33 ms 16088 KB Output is correct
12 Correct 30 ms 15952 KB Output is correct
13 Correct 32 ms 15708 KB Output is correct
14 Correct 32 ms 15956 KB Output is correct
15 Correct 30 ms 15700 KB Output is correct
16 Correct 10 ms 11096 KB Output is correct
17 Correct 37 ms 15660 KB Output is correct
18 Correct 28 ms 15316 KB Output is correct
19 Correct 2 ms 9560 KB Output is correct
20 Correct 2 ms 9564 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 193 ms 25936 KB Output is correct
2 Correct 198 ms 24656 KB Output is correct
3 Correct 187 ms 24272 KB Output is correct
4 Correct 153 ms 24128 KB Output is correct
5 Correct 174 ms 26196 KB Output is correct
6 Correct 153 ms 26832 KB Output is correct
7 Correct 170 ms 27012 KB Output is correct
8 Correct 156 ms 25680 KB Output is correct
9 Correct 156 ms 24476 KB Output is correct
10 Correct 160 ms 24332 KB Output is correct
11 Correct 157 ms 24620 KB Output is correct
12 Correct 154 ms 22840 KB Output is correct
13 Correct 165 ms 23688 KB Output is correct
14 Correct 166 ms 25684 KB Output is correct
15 Correct 167 ms 24004 KB Output is correct
16 Correct 2 ms 9564 KB Output is correct
17 Correct 193 ms 23252 KB Output is correct
18 Correct 148 ms 23028 KB Output is correct
19 Correct 2 ms 9564 KB Output is correct
20 Correct 2 ms 9432 KB Output is correct
21 Correct 269 ms 27656 KB Output is correct
22 Correct 258 ms 42172 KB Output is correct
23 Correct 205 ms 36020 KB Output is correct
24 Correct 199 ms 37392 KB Output is correct
25 Correct 219 ms 36980 KB Output is correct
26 Correct 190 ms 37108 KB Output is correct
27 Correct 220 ms 41016 KB Output is correct
28 Correct 222 ms 39996 KB Output is correct
29 Correct 193 ms 37020 KB Output is correct
30 Correct 200 ms 38736 KB Output is correct
31 Correct 165 ms 34896 KB Output is correct
32 Correct 166 ms 35084 KB Output is correct
33 Correct 197 ms 38072 KB Output is correct
34 Correct 172 ms 35508 KB Output is correct
35 Correct 207 ms 39608 KB Output is correct
36 Correct 19 ms 12472 KB Output is correct
37 Correct 261 ms 36892 KB Output is correct
38 Correct 147 ms 33388 KB Output is correct
39 Correct 52 ms 19228 KB Output is correct
40 Correct 62 ms 20680 KB Output is correct
41 Correct 75 ms 15160 KB Output is correct
42 Correct 61 ms 16576 KB Output is correct
43 Correct 55 ms 16728 KB Output is correct
44 Correct 36 ms 16152 KB Output is correct
45 Correct 53 ms 16468 KB Output is correct
46 Correct 38 ms 16208 KB Output is correct
47 Correct 47 ms 16464 KB Output is correct
48 Correct 41 ms 16000 KB Output is correct
49 Correct 46 ms 16212 KB Output is correct
50 Correct 30 ms 15728 KB Output is correct
51 Correct 33 ms 16088 KB Output is correct
52 Correct 30 ms 15952 KB Output is correct
53 Correct 32 ms 15708 KB Output is correct
54 Correct 32 ms 15956 KB Output is correct
55 Correct 30 ms 15700 KB Output is correct
56 Correct 10 ms 11096 KB Output is correct
57 Correct 37 ms 15660 KB Output is correct
58 Correct 28 ms 15316 KB Output is correct
59 Correct 2 ms 9560 KB Output is correct
60 Correct 2 ms 9564 KB Output is correct
61 Correct 436 ms 48692 KB Output is correct
62 Correct 376 ms 47148 KB Output is correct
63 Correct 391 ms 46240 KB Output is correct
64 Correct 304 ms 45300 KB Output is correct
65 Correct 316 ms 46884 KB Output is correct
66 Correct 321 ms 45612 KB Output is correct
67 Correct 274 ms 44624 KB Output is correct
68 Correct 282 ms 43316 KB Output is correct
69 Correct 311 ms 45428 KB Output is correct
70 Correct 252 ms 41556 KB Output is correct
71 Correct 240 ms 42944 KB Output is correct
72 Correct 247 ms 42072 KB Output is correct
73 Correct 242 ms 42460 KB Output is correct
74 Correct 253 ms 44376 KB Output is correct
75 Correct 253 ms 43012 KB Output is correct
76 Correct 22 ms 12624 KB Output is correct
77 Correct 294 ms 37164 KB Output is correct
78 Correct 198 ms 36392 KB Output is correct
79 Correct 2 ms 9560 KB Output is correct
80 Correct 2 ms 9560 KB Output is correct