oj.uz

답안 #730689

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
730689 2023-04-26T09:15:45 Z vjudge1 Izbori (COCI22_izbori) C++17
110 / 110
 2775 ms 6084 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int NM = 2e5, SZ = 450;

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 1108 KB Output is correct
3 Correct 2 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 2 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 1108 KB Output is correct
3 Correct 2 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 2 ms 1108 KB Output is correct
7 Correct 4 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 10 ms 1144 KB Output is correct
10 Correct 10 ms 1144 KB Output is correct
11 Correct 10 ms 1140 KB Output is correct
12 Correct 11 ms 1108 KB Output is correct
13 Correct 10 ms 1144 KB Output is correct
14 Correct 9 ms 1108 KB Output is correct
15 Correct 8 ms 1108 KB Output is correct
16 Correct 9 ms 1108 KB Output is correct
17 Correct 4 ms 2644 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 301 ms 4336 KB Output is correct
2 Correct 355 ms 4800 KB Output is correct
3 Correct 229 ms 3968 KB Output is correct
4 Correct 412 ms 4848 KB Output is correct
5 Correct 395 ms 4996 KB Output is correct
6 Correct 458 ms 5120 KB Output is correct
7 Correct 436 ms 5120 KB Output is correct
8 Correct 442 ms 5108 KB Output is correct
9 Correct 463 ms 5112 KB Output is correct
10 Correct 421 ms 5240 KB Output is correct
11 Correct 460 ms 5244 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 1108 KB Output is correct
3 Correct 2 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 2 ms 1108 KB Output is correct
7 Correct 4 ms 1108 KB Output is correct
8 Correct 1 ms 1108 KB Output is correct
9 Correct 10 ms 1144 KB Output is correct
10 Correct 10 ms 1144 KB Output is correct
11 Correct 10 ms 1140 KB Output is correct
12 Correct 11 ms 1108 KB Output is correct
13 Correct 10 ms 1144 KB Output is correct
14 Correct 9 ms 1108 KB Output is correct
15 Correct 8 ms 1108 KB Output is correct
16 Correct 9 ms 1108 KB Output is correct
17 Correct 4 ms 2644 KB Output is correct
18 Correct 301 ms 4336 KB Output is correct
19 Correct 355 ms 4800 KB Output is correct
20 Correct 229 ms 3968 KB Output is correct
21 Correct 412 ms 4848 KB Output is correct
22 Correct 395 ms 4996 KB Output is correct
23 Correct 458 ms 5120 KB Output is correct
24 Correct 436 ms 5120 KB Output is correct
25 Correct 442 ms 5108 KB Output is correct
26 Correct 463 ms 5112 KB Output is correct
27 Correct 421 ms 5240 KB Output is correct
28 Correct 460 ms 5244 KB Output is correct
29 Correct 477 ms 5364 KB Output is correct
30 Correct 241 ms 1624 KB Output is correct
31 Correct 484 ms 1884 KB Output is correct
32 Correct 1231 ms 2864 KB Output is correct
33 Correct 501 ms 2004 KB Output is correct
34 Correct 523 ms 1916 KB Output is correct
35 Correct 349 ms 1744 KB Output is correct
36 Correct 209 ms 1584 KB Output is correct
37 Correct 255 ms 1560 KB Output is correct
38 Correct 418 ms 5372 KB Output is correct
39 Correct 438 ms 5240 KB Output is correct
40 Correct 411 ms 5192 KB Output is correct
41 Correct 438 ms 5252 KB Output is correct
42 Correct 426 ms 5376 KB Output is correct
43 Correct 461 ms 5596 KB Output is correct
44 Correct 456 ms 5656 KB Output is correct
45 Correct 468 ms 5720 KB Output is correct
46 Correct 468 ms 5660 KB Output is correct
47 Correct 468 ms 5576 KB Output is correct
48 Correct 1580 ms 5604 KB Output is correct
49 Correct 1593 ms 5988 KB Output is correct
50 Correct 867 ms 5868 KB Output is correct
51 Correct 868 ms 5872 KB Output is correct
52 Correct 2775 ms 5956 KB Output is correct
53 Correct 2551 ms 6084 KB Output is correct
54 Correct 1598 ms 5988 KB Output is correct