oj.uz

답안 #866228

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
866228 2023-10-25T15:42:06 Z TAhmed33 Izbori (COCI22_izbori) C++
40 / 110
 3000 ms 9684 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
inline ll trig (ll x) { return x * (x + 1) / 2; }
ll get2 (ll a, ll b, ll c) {
	a = min(a, c); b = min(b, c);
	c = min(c, a + b);
	return (c - b) * (b + 1) + (c + 1) * (a - c + b + 1) - trig(a) + trig(c - b - 1);
}
const int MAXN = 2e5 + 25;
int arr[MAXN], n;
vector <int> occ[MAXN];
vector <int> d;
int a[2 * MAXN + 25];
ll solve1 (int x) {
	memset(a, 0, sizeof(a));
	ll ret = 0; int cur = 0; int sum = 0; a[MAXN] = 1;
	for (int i = 1; i <= n; i++) {
		if (arr[i] == x) {
			sum++; cur += a[sum - 1 + MAXN];
		} else {
			cur -= a[sum - 1 + MAXN]; sum--;
		}
		ret += cur; a[sum + MAXN]++;
	}
	return ret;
}
ll solve2 (int x) {
	ll ret = (int)occ[x].size() - 2;
	for (int i = 1; i < (int)occ[x].size() - 2; i--) {
		for (int j = i + 1; j < (int)occ[x].size() - 1; j++) {
			ret += get2(occ[x][i] - occ[x][i - 1], occ[x][j + 1] - occ[x][j], 2 * (j - i + 1) - 2 - occ[x][j] + occ[x][i]);
		}
	}
	return ret;
}
int main () {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> arr[i];
		d.push_back(arr[i]);
	}
	sort(d.begin(), d.end()); d.resize(unique(d.begin(), d.end()) - d.begin());
	for (int i = 1; i <= n; i++) arr[i] = lower_bound(d.begin(), d.end(), arr[i]) - d.begin();
	for (int i = 1; i <= n; i++) {
		occ[arr[i]].push_back(i);
	}
	ll sum = 0;
	int x = sqrt(n); while (x * x < n) x++; while (x * x > n) x--;
	for (int i = 0; i < n; i++) {
		if (occ[i].empty()) continue;
		if ((int)occ[i].size() > x) sum += solve1(i);
		else {
			occ[i].push_back(n + 1);
			occ[i].insert(occ[i].begin(), 0);
			sum += solve2(i);
		}
	}
	cout << sum << '\n';
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6748 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 1 ms 6748 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6748 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 1 ms 6748 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 3 ms 6744 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6748 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 4 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 1 ms 6748 KB Output is correct

Subtask #3
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 8664 KB Output is correct
2 Correct 16 ms 9340 KB Output is correct
3 Correct 10 ms 8156 KB Output is correct
4 Correct 18 ms 9408 KB Output is correct
5 Correct 20 ms 9216 KB Output is correct
6 Correct 19 ms 9540 KB Output is correct
7 Correct 18 ms 9552 KB Output is correct
8 Correct 18 ms 9684 KB Output is correct
9 Correct 17 ms 9432 KB Output is correct
10 Correct 18 ms 9332 KB Output is correct
11 Correct 14 ms 9432 KB Output is correct

Subtask #4
0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6748 KB Output is correct
4 Correct 1 ms 6748 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 1 ms 6748 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 2 ms 6748 KB Output is correct
10 Correct 3 ms 6744 KB Output is correct
11 Correct 2 ms 6748 KB Output is correct
12 Correct 2 ms 6748 KB Output is correct
13 Correct 2 ms 6748 KB Output is correct
14 Correct 4 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 2 ms 6748 KB Output is correct
17 Correct 1 ms 6748 KB Output is correct
18 Correct 12 ms 8664 KB Output is correct
19 Correct 16 ms 9340 KB Output is correct
20 Correct 10 ms 8156 KB Output is correct
21 Correct 18 ms 9408 KB Output is correct
22 Correct 20 ms 9216 KB Output is correct
23 Correct 19 ms 9540 KB Output is correct
24 Correct 18 ms 9552 KB Output is correct
25 Correct 18 ms 9684 KB Output is correct
26 Correct 17 ms 9432 KB Output is correct
27 Correct 18 ms 9332 KB Output is correct
28 Correct 14 ms 9432 KB Output is correct
29 Correct 26 ms 9428 KB Output is correct
30 Execution timed out 3061 ms 7920 KB Time limit exceeded
31 Halted 0 ms 0 KB -