oj.uz

Submission #793263

# Submission time Handle Problem Language Result Execution time Memory
793263 2023-07-25T16:57:43 Z enerelt14 Abracadabra (CEOI22_abracadabra) C++17
100 / 100
 708 ms 42296 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 292 ms 25100 KB Output is correct
2 Correct 300 ms 25148 KB Output is correct
3 Correct 326 ms 24332 KB Output is correct
4 Correct 280 ms 24172 KB Output is correct
5 Correct 296 ms 24976 KB Output is correct
6 Correct 294 ms 24328 KB Output is correct
7 Correct 305 ms 25388 KB Output is correct
8 Correct 304 ms 24672 KB Output is correct
9 Correct 301 ms 24528 KB Output is correct
10 Correct 294 ms 24792 KB Output is correct
11 Correct 307 ms 24768 KB Output is correct
12 Correct 306 ms 24568 KB Output is correct
13 Correct 294 ms 24848 KB Output is correct
14 Correct 297 ms 25116 KB Output is correct
15 Correct 300 ms 25364 KB Output is correct
16 Correct 2 ms 4180 KB Output is correct
17 Correct 280 ms 24984 KB Output is correct
18 Correct 293 ms 24624 KB Output is correct
19 Correct 2 ms 4180 KB Output is correct
20 Correct 2 ms 4180 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 390 ms 37896 KB Output is correct
2 Correct 380 ms 41024 KB Output is correct
3 Correct 418 ms 32748 KB Output is correct
4 Correct 303 ms 29908 KB Output is correct
5 Correct 319 ms 30468 KB Output is correct
6 Correct 284 ms 29504 KB Output is correct
7 Correct 315 ms 32972 KB Output is correct
8 Correct 311 ms 32828 KB Output is correct
9 Correct 316 ms 29644 KB Output is correct
10 Correct 282 ms 30644 KB Output is correct
11 Correct 263 ms 26624 KB Output is correct
12 Correct 282 ms 26708 KB Output is correct
13 Correct 283 ms 30528 KB Output is correct
14 Correct 264 ms 27168 KB Output is correct
15 Correct 293 ms 30972 KB Output is correct
16 Correct 21 ms 8908 KB Output is correct
17 Correct 352 ms 42296 KB Output is correct
18 Correct 229 ms 25764 KB Output is correct
19 Correct 69 ms 13088 KB Output is correct
20 Correct 71 ms 13556 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 12636 KB Output is correct
2 Correct 87 ms 14172 KB Output is correct
3 Correct 109 ms 12336 KB Output is correct
4 Correct 50 ms 10056 KB Output is correct
5 Correct 71 ms 12300 KB Output is correct
6 Correct 47 ms 10196 KB Output is correct
7 Correct 61 ms 11344 KB Output is correct
8 Correct 56 ms 10868 KB Output is correct
9 Correct 66 ms 11404 KB Output is correct
10 Correct 43 ms 9364 KB Output is correct
11 Correct 45 ms 9576 KB Output is correct
12 Correct 41 ms 9276 KB Output is correct
13 Correct 49 ms 9508 KB Output is correct
14 Correct 43 ms 9400 KB Output is correct
15 Correct 39 ms 9156 KB Output is correct
16 Correct 12 ms 6684 KB Output is correct
17 Correct 67 ms 15228 KB Output is correct
18 Correct 39 ms 9024 KB Output is correct
19 Correct 2 ms 4252 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 292 ms 25100 KB Output is correct
2 Correct 300 ms 25148 KB Output is correct
3 Correct 326 ms 24332 KB Output is correct
4 Correct 280 ms 24172 KB Output is correct
5 Correct 296 ms 24976 KB Output is correct
6 Correct 294 ms 24328 KB Output is correct
7 Correct 305 ms 25388 KB Output is correct
8 Correct 304 ms 24672 KB Output is correct
9 Correct 301 ms 24528 KB Output is correct
10 Correct 294 ms 24792 KB Output is correct
11 Correct 307 ms 24768 KB Output is correct
12 Correct 306 ms 24568 KB Output is correct
13 Correct 294 ms 24848 KB Output is correct
14 Correct 297 ms 25116 KB Output is correct
15 Correct 300 ms 25364 KB Output is correct
16 Correct 2 ms 4180 KB Output is correct
17 Correct 280 ms 24984 KB Output is correct
18 Correct 293 ms 24624 KB Output is correct
19 Correct 2 ms 4180 KB Output is correct
20 Correct 2 ms 4180 KB Output is correct
21 Correct 390 ms 37896 KB Output is correct
22 Correct 380 ms 41024 KB Output is correct
23 Correct 418 ms 32748 KB Output is correct
24 Correct 303 ms 29908 KB Output is correct
25 Correct 319 ms 30468 KB Output is correct
26 Correct 284 ms 29504 KB Output is correct
27 Correct 315 ms 32972 KB Output is correct
28 Correct 311 ms 32828 KB Output is correct
29 Correct 316 ms 29644 KB Output is correct
30 Correct 282 ms 30644 KB Output is correct
31 Correct 263 ms 26624 KB Output is correct
32 Correct 282 ms 26708 KB Output is correct
33 Correct 283 ms 30528 KB Output is correct
34 Correct 264 ms 27168 KB Output is correct
35 Correct 293 ms 30972 KB Output is correct
36 Correct 21 ms 8908 KB Output is correct
37 Correct 352 ms 42296 KB Output is correct
38 Correct 229 ms 25764 KB Output is correct
39 Correct 69 ms 13088 KB Output is correct
40 Correct 71 ms 13556 KB Output is correct
41 Correct 83 ms 12636 KB Output is correct
42 Correct 87 ms 14172 KB Output is correct
43 Correct 109 ms 12336 KB Output is correct
44 Correct 50 ms 10056 KB Output is correct
45 Correct 71 ms 12300 KB Output is correct
46 Correct 47 ms 10196 KB Output is correct
47 Correct 61 ms 11344 KB Output is correct
48 Correct 56 ms 10868 KB Output is correct
49 Correct 66 ms 11404 KB Output is correct
50 Correct 43 ms 9364 KB Output is correct
51 Correct 45 ms 9576 KB Output is correct
52 Correct 41 ms 9276 KB Output is correct
53 Correct 49 ms 9508 KB Output is correct
54 Correct 43 ms 9400 KB Output is correct
55 Correct 39 ms 9156 KB Output is correct
56 Correct 12 ms 6684 KB Output is correct
57 Correct 67 ms 15228 KB Output is correct
58 Correct 39 ms 9024 KB Output is correct
59 Correct 2 ms 4252 KB Output is correct
60 Correct 2 ms 4180 KB Output is correct
61 Correct 504 ms 37368 KB Output is correct
62 Correct 566 ms 40348 KB Output is correct
63 Correct 708 ms 36076 KB Output is correct
64 Correct 434 ms 33080 KB Output is correct
65 Correct 448 ms 34360 KB Output is correct
66 Correct 424 ms 32996 KB Output is correct
67 Correct 414 ms 32436 KB Output is correct
68 Correct 452 ms 32296 KB Output is correct
69 Correct 460 ms 32508 KB Output is correct
70 Correct 413 ms 30512 KB Output is correct
71 Correct 367 ms 29844 KB Output is correct
72 Correct 375 ms 30388 KB Output is correct
73 Correct 373 ms 30288 KB Output is correct
74 Correct 371 ms 30688 KB Output is correct
75 Correct 401 ms 30948 KB Output is correct
76 Correct 19 ms 8524 KB Output is correct
77 Correct 422 ms 41748 KB Output is correct
78 Correct 349 ms 29188 KB Output is correct
79 Correct 2 ms 4252 KB Output is correct
80 Correct 2 ms 4180 KB Output is correct