oj.uz

Submission #793262

# Submission time Handle Problem Language Result Execution time Memory
793262 2023-07-25T16:56:24 Z enerelt14 Abracadabra (CEOI22_abracadabra) C++14
100 / 100
 718 ms 52752 KB 
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <chrono>
#include <climits>
#include <cmath>
#include <complex>
#include <cstring>
#include <functional>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <vector>
#include <stack>
#define pb push_back
#define ff first
#define ss second
using namespace std;

const int MX = 1e6 + 5;

int n, q, l, r, cur;
int p[MX], ans[MX], fix[MX], nxt[MX], tree[4 * MX];
pair<pair<int, int>, int> t[MX];
set<pair<pair<int, int>, int> > s;

void update(int id, int l, int r, int x, int val) {
	if(l > x || r < x) return;
	tree[id] += val;
	if(l == r) return;
	int mid = (l + r) / 2;
	update(id * 2 + 1, l, mid, x, val);
	update(id * 2 + 2, mid + 1, r, x, val);
}

int sum(int id, int l, int r, int L, int R) {
	if(L > r || l > R) return 0;
	if(L <= l && r <= R) return tree[id];
	int mid = (l + r) / 2;
	return sum(id * 2 + 1, l, mid, L, R) + sum(id * 2 + 2, mid + 1, r, L, R);
}

int find(int id, int l, int r, int x) {
	if(l == r) {
		if(tree[id] < x) return l;
		else return l - 1;
	}
	int mid = (l + r) / 2;
	if(tree[id * 2 + 1] < x) return find(id * 2 + 2, mid + 1, r, x - tree[id * 2 + 1]);
	else return find(id * 2 + 1, l, mid, x);
}

void pre() {
	while((*s.rbegin()).ff.ss + r <= n / 2) {
		for(int i = 0; i < (*s.rbegin()).ff.ss; i++) {
			fix[n - r - (*s.rbegin()).ff.ss + i] = p[(*s.rbegin()).ss + i];
		}
		r += (*s.rbegin()).ff.ss;
		s.erase(*s.rbegin());
	}
}

void go() {
	if(r == n / 2) return;
	pair<pair<int, int>, int> x = *s.rbegin();
	s.erase(*s.rbegin());
	s.insert({{x.ff.ff, x.ff.ss + r - n / 2}, x.ss});
	update(0, 1, n, x.ff.ff, r - n / 2);
	int ind = x.ss + x.ff.ss + r - n / 2;
	while(ind < x.ss + x.ff.ss) {
		s.insert({{p[ind], min(nxt[ind], x.ss + x.ff.ss) - ind}, ind});
		update(0, 1, n, p[ind], min(nxt[ind], x.ss + x.ff.ss) - ind);
		ind = nxt[ind];
	}
	pre();
}

int main() {
	ios::sync_with_stdio(0);cin.tie(0);
	memset(fix, -1, sizeof(fix));
	cin >> n >> q;
	stack<pair<int, int > > st;
	for(int i = 0; i <= n; i++) {
		if (i != n) {
			cin >> p[i];
		}
		else {
			p[i] = INT_MAX;
		}
		while(!st.empty() && st.top().ff < p[i]) {
			nxt[st.top().ss] = i;
			st.pop();
		}
		st.push({p[i], i});
	}
	while(l < n) {
		s.insert({{p[l], nxt[l] - l}, l});
		update(0, 1, n, p[l], nxt[l] - l);
		l = nxt[l];
	}
	pre();
	for(int i = 0; i < q; i++) {
		cin >> t[i].ff.ff >> t[i].ff.ss;
		t[i].ss = i;
		if (t[i].ff.ff > n) t[i].ff.ff = n;
	}
	sort(t, t + q);
	for(int i = 0; i <= n; i++) {
		if(t[cur].ff.ff > i) {
			go();
			continue;
		}
		while(cur < q && t[cur].ff.ff == i) {
			if(t[cur].ff.ss + r <= n) {
			 	int k = find(0, 1, n, t[cur].ff.ss) + 1;
			 	auto itr = s.lower_bound({{k, 0}, 0});
			 	int cnt = sum(0, 1, n, 1, k - 1);
		 		ans[t[cur].ss] = p[(*itr).ss + t[cur].ff.ss - cnt - 1];
		 		cur++;
		 	}
		 	else {
		 		ans[t[cur].ss] = fix[t[cur].ff.ss - 1];
		 		cur++;
		 	}
		}
		go();
	}
	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 287 ms 31472 KB Output is correct
2 Correct 306 ms 31180 KB Output is correct
3 Correct 319 ms 30408 KB Output is correct
4 Correct 280 ms 29008 KB Output is correct
5 Correct 298 ms 30768 KB Output is correct
6 Correct 274 ms 29316 KB Output is correct
7 Correct 310 ms 30964 KB Output is correct
8 Correct 280 ms 29452 KB Output is correct
9 Correct 283 ms 29084 KB Output is correct
10 Correct 281 ms 29612 KB Output is correct
11 Correct 279 ms 29580 KB Output is correct
12 Correct 279 ms 28396 KB Output is correct
13 Correct 308 ms 29272 KB Output is correct
14 Correct 291 ms 30200 KB Output is correct
15 Correct 313 ms 30056 KB Output is correct
16 Correct 2 ms 4180 KB Output is correct
17 Correct 317 ms 28844 KB Output is correct
18 Correct 287 ms 28520 KB Output is correct
19 Correct 2 ms 4180 KB Output is correct
20 Correct 2 ms 4248 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 397 ms 50644 KB Output is correct
2 Correct 376 ms 52752 KB Output is correct
3 Correct 397 ms 41764 KB Output is correct
4 Correct 302 ms 38972 KB Output is correct
5 Correct 311 ms 39884 KB Output is correct
6 Correct 317 ms 38540 KB Output is correct
7 Correct 327 ms 44844 KB Output is correct
8 Correct 308 ms 43980 KB Output is correct
9 Correct 299 ms 39048 KB Output is correct
10 Correct 291 ms 41040 KB Output is correct
11 Correct 269 ms 34516 KB Output is correct
12 Correct 258 ms 35096 KB Output is correct
13 Correct 284 ms 40192 KB Output is correct
14 Correct 279 ms 35836 KB Output is correct
15 Correct 307 ms 41840 KB Output is correct
16 Correct 23 ms 9020 KB Output is correct
17 Correct 378 ms 50128 KB Output is correct
18 Correct 235 ms 32032 KB Output is correct
19 Correct 69 ms 14660 KB Output is correct
20 Correct 75 ms 16716 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 12992 KB Output is correct
2 Correct 85 ms 14664 KB Output is correct
3 Correct 101 ms 12728 KB Output is correct
4 Correct 45 ms 10356 KB Output is correct
5 Correct 72 ms 12692 KB Output is correct
6 Correct 48 ms 10512 KB Output is correct
7 Correct 67 ms 11860 KB Output is correct
8 Correct 56 ms 11208 KB Output is correct
9 Correct 65 ms 11872 KB Output is correct
10 Correct 44 ms 9744 KB Output is correct
11 Correct 43 ms 9868 KB Output is correct
12 Correct 41 ms 9632 KB Output is correct
13 Correct 49 ms 9820 KB Output is correct
14 Correct 53 ms 9884 KB Output is correct
15 Correct 41 ms 9408 KB Output is correct
16 Correct 10 ms 6740 KB Output is correct
17 Correct 68 ms 15352 KB Output is correct
18 Correct 38 ms 9184 KB Output is correct
19 Correct 2 ms 4180 KB Output is correct
20 Correct 2 ms 4180 KB Output is correct

Subtask #4
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 287 ms 31472 KB Output is correct
2 Correct 306 ms 31180 KB Output is correct
3 Correct 319 ms 30408 KB Output is correct
4 Correct 280 ms 29008 KB Output is correct
5 Correct 298 ms 30768 KB Output is correct
6 Correct 274 ms 29316 KB Output is correct
7 Correct 310 ms 30964 KB Output is correct
8 Correct 280 ms 29452 KB Output is correct
9 Correct 283 ms 29084 KB Output is correct
10 Correct 281 ms 29612 KB Output is correct
11 Correct 279 ms 29580 KB Output is correct
12 Correct 279 ms 28396 KB Output is correct
13 Correct 308 ms 29272 KB Output is correct
14 Correct 291 ms 30200 KB Output is correct
15 Correct 313 ms 30056 KB Output is correct
16 Correct 2 ms 4180 KB Output is correct
17 Correct 317 ms 28844 KB Output is correct
18 Correct 287 ms 28520 KB Output is correct
19 Correct 2 ms 4180 KB Output is correct
20 Correct 2 ms 4248 KB Output is correct
21 Correct 397 ms 50644 KB Output is correct
22 Correct 376 ms 52752 KB Output is correct
23 Correct 397 ms 41764 KB Output is correct
24 Correct 302 ms 38972 KB Output is correct
25 Correct 311 ms 39884 KB Output is correct
26 Correct 317 ms 38540 KB Output is correct
27 Correct 327 ms 44844 KB Output is correct
28 Correct 308 ms 43980 KB Output is correct
29 Correct 299 ms 39048 KB Output is correct
30 Correct 291 ms 41040 KB Output is correct
31 Correct 269 ms 34516 KB Output is correct
32 Correct 258 ms 35096 KB Output is correct
33 Correct 284 ms 40192 KB Output is correct
34 Correct 279 ms 35836 KB Output is correct
35 Correct 307 ms 41840 KB Output is correct
36 Correct 23 ms 9020 KB Output is correct
37 Correct 378 ms 50128 KB Output is correct
38 Correct 235 ms 32032 KB Output is correct
39 Correct 69 ms 14660 KB Output is correct
40 Correct 75 ms 16716 KB Output is correct
41 Correct 81 ms 12992 KB Output is correct
42 Correct 85 ms 14664 KB Output is correct
43 Correct 101 ms 12728 KB Output is correct
44 Correct 45 ms 10356 KB Output is correct
45 Correct 72 ms 12692 KB Output is correct
46 Correct 48 ms 10512 KB Output is correct
47 Correct 67 ms 11860 KB Output is correct
48 Correct 56 ms 11208 KB Output is correct
49 Correct 65 ms 11872 KB Output is correct
50 Correct 44 ms 9744 KB Output is correct
51 Correct 43 ms 9868 KB Output is correct
52 Correct 41 ms 9632 KB Output is correct
53 Correct 49 ms 9820 KB Output is correct
54 Correct 53 ms 9884 KB Output is correct
55 Correct 41 ms 9408 KB Output is correct
56 Correct 10 ms 6740 KB Output is correct
57 Correct 68 ms 15352 KB Output is correct
58 Correct 38 ms 9184 KB Output is correct
59 Correct 2 ms 4180 KB Output is correct
60 Correct 2 ms 4180 KB Output is correct
61 Correct 500 ms 50088 KB Output is correct
62 Correct 577 ms 52580 KB Output is correct
63 Correct 718 ms 47932 KB Output is correct
64 Correct 472 ms 44680 KB Output is correct
65 Correct 473 ms 46468 KB Output is correct
66 Correct 426 ms 44724 KB Output is correct
67 Correct 420 ms 44340 KB Output is correct
68 Correct 443 ms 43640 KB Output is correct
69 Correct 466 ms 44036 KB Output is correct
70 Correct 422 ms 41432 KB Output is correct
71 Correct 367 ms 40032 KB Output is correct
72 Correct 425 ms 41180 KB Output is correct
73 Correct 377 ms 40764 KB Output is correct
74 Correct 396 ms 41948 KB Output is correct
75 Correct 394 ms 42032 KB Output is correct
76 Correct 18 ms 8956 KB Output is correct
77 Correct 414 ms 50344 KB Output is correct
78 Correct 369 ms 37724 KB Output is correct
79 Correct 2 ms 4180 KB Output is correct
80 Correct 2 ms 4180 KB Output is correct