oj.uz

Submission #851326

# Submission time Handle Problem Language Result Execution time Memory
851326 2023-09-19T14:57:16 Z serifefedartar Index (COCI21_index) C++17
110 / 110
 361 ms 9976 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define fast ios::sync_with_stdio(0);cin.tie(0);
#define s second
#define f first
typedef long long ll;
const ll MOD = 1e9 + 7;
const ll LOGN = 20;
const ll MAXN = 2e5 + 5;

const ll SQ = 500;
vector<pair<pair<int,int>,int>> query;
vector<int> A;
int ans[MAXN], suff[MAXN], res = 1, cnt = 1;
void insert(int x) {
	suff[A[x]]++;
	if (A[x] >= res)
		cnt++;

	if (cnt - suff[res] > res) {
		cnt -= suff[res];
		res++;
	}
}

void omit(int x) {
	suff[A[x]]--;
	if (A[x] >= res)
		cnt--;

	if (cnt < res) {
		res--;
		cnt += suff[res];
	}
}

int main() {
	fast
	int N, Q;
	cin >> N >> Q;

	A = vector<int>(N+1);
	query = vector<pair<pair<int,int>,int>>(Q);
	for (int i = 1; i <= N; i++)
		cin >> A[i];
	for (int i = 0; i < Q; i++) {
		cin >> query[i].f.f >> query[i].f.s;
		query[i].s = i;
	}
	sort(query.begin(), query.end(), [&](pair<pair<int,int>,int> a, pair<pair<int,int>,int> b) {
		return make_pair(a.f.f / SQ, a.f.s) < make_pair(b.f.f / SQ, b.f.s);
	});

	int l = 1, r = 1;
	suff[A[1]]++;
	for (auto u : query) {
		int new_l = u.f.f;
		int new_r = u.f.s;
		while (new_l < l) {
			l--;
			insert(l);
		}
		
		while (new_r > r) {
			r++;
			insert(r);
		}
		
		while (new_l > l) {
			omit(l);
			l++;
		}
		
		while (new_r < r) {
			omit(r);
			r--;
		}

		ans[u.s] = res;
	}

	for (int i = 0; i < Q; i++)
		cout << ans[i] << "\n";
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 81 ms 1872 KB Output is correct
12 Correct 81 ms 1872 KB Output is correct
13 Correct 85 ms 1884 KB Output is correct
14 Correct 82 ms 1888 KB Output is correct
15 Correct 83 ms 1872 KB Output is correct
16 Correct 82 ms 1872 KB Output is correct
17 Correct 82 ms 1872 KB Output is correct
18 Correct 81 ms 1892 KB Output is correct
19 Correct 81 ms 1884 KB Output is correct
20 Correct 81 ms 1872 KB Output is correct

Subtask #3
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 81 ms 1872 KB Output is correct
12 Correct 81 ms 1872 KB Output is correct
13 Correct 85 ms 1884 KB Output is correct
14 Correct 82 ms 1888 KB Output is correct
15 Correct 83 ms 1872 KB Output is correct
16 Correct 82 ms 1872 KB Output is correct
17 Correct 82 ms 1872 KB Output is correct
18 Correct 81 ms 1892 KB Output is correct
19 Correct 81 ms 1884 KB Output is correct
20 Correct 81 ms 1872 KB Output is correct
21 Correct 353 ms 6480 KB Output is correct
22 Correct 356 ms 9864 KB Output is correct
23 Correct 355 ms 9808 KB Output is correct
24 Correct 355 ms 9808 KB Output is correct
25 Correct 355 ms 9808 KB Output is correct
26 Correct 361 ms 9972 KB Output is correct
27 Correct 356 ms 9976 KB Output is correct
28 Correct 353 ms 9808 KB Output is correct
29 Correct 355 ms 9868 KB Output is correct
30 Correct 356 ms 9868 KB Output is correct