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답안 #730691

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
730691 2023-04-26T09:18:03 Z vjudge1 Izbori (COCI22_izbori) C++17
110 / 110
 1878 ms 5308 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int NM = 2e5, SZ = 700;

int n, a[NM+5], cnt[NM+5];
bool type[NM+5];
vector <int> v;
ll ans = 0;
int pref[NM+5];
int bit[2*NM+5];

void compress(){
	for (int i = 1; i <= n; i++)
		v.push_back(a[i]);
	sort(v.begin(), v.end());
	for (int i = 1; i <= n; i++)
		a[i] = lower_bound(v.begin(), v.end(), a[i])-v.begin();
}

void solve1(){
	memset(cnt, 0, sizeof(cnt));
	for (int i = 1; i <= n; i++){
		int best = -1;
		for (int j = i; j < min(i+2*SZ, n+1); j++){
			if (type[a[j]] == 0) cnt[a[j]]++;
			if (best == -1 || cnt[a[j]] > cnt[best]) best = a[j];
			if (cnt[best]*2 > j-i+1){
				ans++;
			}
		}
		for (int j = i; j < min(i+2*SZ, n+1); j++)
			if (type[a[j]] == 0) cnt[a[j]]--;
	}
}

void update(int p){
	while (p <= 2*n+1){
		bit[p]++;
		p += p & (-p);
	}
}

int get(int p){
	int res = 0;
	while (p > 0){
		res += bit[p];
		p -= p & (-p);
	}
	return res;
}

void solve2(int s){
	pref[0] = 0;
	for (int i = 1; i <= n; i++){
		pref[i] = pref[i-1];
		if (a[i] == s) pref[i]++;
	}
	memset(bit, 0, sizeof(bit));
	update(n+1);
	for (int i = 1; i <= n; i++){
		ans += get(2*pref[i]-i+n);
		update(2*pref[i]-i+n+1);
	}
}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++)
		cin >> a[i];
	compress();
	for (int i = 1; i <= n; i++)
		cnt[a[i]]++;
	for (int i = 0; i < n; i++)
		if (cnt[i] > SZ) type[i] = 1;
	solve1();
	for (int i = 0; i < n; i++)
		if (type[i]) solve2(i);
	cout << ans;
	return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1048 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1048 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 3 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 11 ms 1144 KB Output is correct
10 Correct 14 ms 1108 KB Output is correct
11 Correct 13 ms 1144 KB Output is correct
12 Correct 12 ms 1108 KB Output is correct
13 Correct 13 ms 1144 KB Output is correct
14 Correct 13 ms 1108 KB Output is correct
15 Correct 12 ms 1140 KB Output is correct
16 Correct 12 ms 1108 KB Output is correct
17 Correct 5 ms 2644 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 460 ms 4336 KB Output is correct
2 Correct 544 ms 4916 KB Output is correct
3 Correct 306 ms 3960 KB Output is correct
4 Correct 567 ms 4848 KB Output is correct
5 Correct 635 ms 4912 KB Output is correct
6 Correct 644 ms 5188 KB Output is correct
7 Correct 677 ms 5116 KB Output is correct
8 Correct 734 ms 5116 KB Output is correct
9 Correct 626 ms 5108 KB Output is correct
10 Correct 630 ms 5112 KB Output is correct
11 Correct 607 ms 5108 KB Output is correct

Subtask #4
70.0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1108 KB Output is correct
2 Correct 1 ms 1048 KB Output is correct
3 Correct 1 ms 1108 KB Output is correct
4 Correct 1 ms 1108 KB Output is correct
5 Correct 1 ms 1108 KB Output is correct
6 Correct 1 ms 1108 KB Output is correct
7 Correct 3 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 11 ms 1144 KB Output is correct
10 Correct 14 ms 1108 KB Output is correct
11 Correct 13 ms 1144 KB Output is correct
12 Correct 12 ms 1108 KB Output is correct
13 Correct 13 ms 1144 KB Output is correct
14 Correct 13 ms 1108 KB Output is correct
15 Correct 12 ms 1140 KB Output is correct
16 Correct 12 ms 1108 KB Output is correct
17 Correct 5 ms 2644 KB Output is correct
18 Correct 460 ms 4336 KB Output is correct
19 Correct 544 ms 4916 KB Output is correct
20 Correct 306 ms 3960 KB Output is correct
21 Correct 567 ms 4848 KB Output is correct
22 Correct 635 ms 4912 KB Output is correct
23 Correct 644 ms 5188 KB Output is correct
24 Correct 677 ms 5116 KB Output is correct
25 Correct 734 ms 5116 KB Output is correct
26 Correct 626 ms 5108 KB Output is correct
27 Correct 630 ms 5112 KB Output is correct
28 Correct 607 ms 5108 KB Output is correct
29 Correct 636 ms 5108 KB Output is correct
30 Correct 357 ms 1496 KB Output is correct
31 Correct 721 ms 1748 KB Output is correct
32 Correct 1788 ms 2716 KB Output is correct
33 Correct 785 ms 1876 KB Output is correct
34 Correct 850 ms 1868 KB Output is correct
35 Correct 540 ms 1624 KB Output is correct
36 Correct 312 ms 1496 KB Output is correct
37 Correct 390 ms 1496 KB Output is correct
38 Correct 649 ms 5124 KB Output is correct
39 Correct 624 ms 5120 KB Output is correct
40 Correct 639 ms 5128 KB Output is correct
41 Correct 611 ms 5128 KB Output is correct
42 Correct 646 ms 5128 KB Output is correct
43 Correct 668 ms 5152 KB Output is correct
44 Correct 714 ms 5148 KB Output is correct
45 Correct 722 ms 5144 KB Output is correct
46 Correct 696 ms 5192 KB Output is correct
47 Correct 676 ms 5152 KB Output is correct
48 Correct 1869 ms 5304 KB Output is correct
49 Correct 1878 ms 5300 KB Output is correct
50 Correct 1095 ms 5300 KB Output is correct
51 Correct 1105 ms 5308 KB Output is correct
52 Correct 1685 ms 2680 KB Output is correct
53 Correct 1744 ms 2748 KB Output is correct
54 Correct 1830 ms 5308 KB Output is correct