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Submission #866306

# Submission time Handle Problem Language Result Execution time Memory
866306 2023-10-25T19:56:03 Z TAhmed33 Izbori (COCI22_izbori) C++
110 / 110
 127 ms 12932 KB 
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("Ofast")
#pragma GCC target ("popcnt")
typedef long long ll;
inline ll trig (ll x) { return ((x * (x + 1)) >> 1); }
inline ll get2 (ll a, ll b, ll c) {
	if (c < 0) return 0;
	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;
}
array <int, 500> p; 
ll solve2 (int x) {
	for (int i = 0; i < (int)occ[x].size(); i++) p[i] = occ[x][i];
	int u = occ[x].size(); ll ret = 0;
	//cout << x << ": \n";
	for (int i = 0; i < u - 1; i++) {
		for (int j = i + 1; j < u; j++) {
			if (2 * (j - i + 1) - 2 - p[j] + p[i] < 0) continue;
			ret += get2(p[i] - (i == 0 ? 0 : p[i - 1]) - 1, (j == u - 1 ? n + 1 : p[j + 1]) - p[j] - 1, 2 * (j - i + 1) - 2 - p[j] + p[i]);
			//cout << ret << '\n';
			if (j - i + 1 <= (p[j] - p[i] + 1) / 2) ret -= get2(p[i] - (i == 0 ? 0 : p[i - 1]) - 1, (j == u - 1 ? n + 1 : p[j + 1]) - p[j] - 1, (p[j] - p[i] + 1) / 2 - (j - i + 1));
			//cout << i << " | " << j << " " << ret << '\n';
		}
	}
	ret += u;
	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);
	}
	bool flag = 1; for (int i = 1; i <= n; i++) flag |= (arr[i] <= 2);
	if (n >= 1e5 && !flag) return 0;
	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 {
			sum += solve2(i);
		}
	}
	cout << sum << '\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6748 KB Output is correct
4 Correct 2 ms 6744 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 2 ms 6756 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6748 KB Output is correct
4 Correct 2 ms 6744 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 2 ms 6756 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 3 ms 7000 KB Output is correct
10 Correct 2 ms 6748 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 6656 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 3 ms 6840 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 9176 KB Output is correct
2 Correct 16 ms 9684 KB Output is correct
3 Correct 14 ms 8412 KB Output is correct
4 Correct 16 ms 9688 KB Output is correct
5 Correct 17 ms 9624 KB Output is correct
6 Correct 22 ms 9944 KB Output is correct
7 Correct 17 ms 9940 KB Output is correct
8 Correct 18 ms 9944 KB Output is correct
9 Correct 17 ms 9940 KB Output is correct
10 Correct 24 ms 9924 KB Output is correct
11 Correct 14 ms 9944 KB Output is correct

Subtask #4
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6748 KB Output is correct
4 Correct 2 ms 6744 KB Output is correct
5 Correct 2 ms 6748 KB Output is correct
6 Correct 2 ms 6756 KB Output is correct
7 Correct 2 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 3 ms 7000 KB Output is correct
10 Correct 2 ms 6748 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 6656 KB Output is correct
14 Correct 2 ms 6748 KB Output is correct
15 Correct 2 ms 6748 KB Output is correct
16 Correct 3 ms 6840 KB Output is correct
17 Correct 2 ms 6748 KB Output is correct
18 Correct 12 ms 9176 KB Output is correct
19 Correct 16 ms 9684 KB Output is correct
20 Correct 14 ms 8412 KB Output is correct
21 Correct 16 ms 9688 KB Output is correct
22 Correct 17 ms 9624 KB Output is correct
23 Correct 22 ms 9944 KB Output is correct
24 Correct 17 ms 9940 KB Output is correct
25 Correct 18 ms 9944 KB Output is correct
26 Correct 17 ms 9940 KB Output is correct
27 Correct 24 ms 9924 KB Output is correct
28 Correct 14 ms 9944 KB Output is correct
29 Correct 24 ms 10704 KB Output is correct
30 Correct 12 ms 8160 KB Output is correct
31 Correct 23 ms 9436 KB Output is correct
32 Correct 57 ms 12932 KB Output is correct
33 Correct 25 ms 9692 KB Output is correct
34 Correct 32 ms 9940 KB Output is correct
35 Correct 16 ms 8672 KB Output is correct
36 Correct 10 ms 7904 KB Output is correct
37 Correct 12 ms 8044 KB Output is correct
38 Correct 19 ms 9944 KB Output is correct
39 Correct 23 ms 9944 KB Output is correct
40 Correct 20 ms 9928 KB Output is correct
41 Correct 19 ms 9916 KB Output is correct
42 Correct 21 ms 9688 KB Output is correct
43 Correct 36 ms 11424 KB Output is correct
44 Correct 31 ms 11468 KB Output is correct
45 Correct 31 ms 11472 KB Output is correct
46 Correct 30 ms 11472 KB Output is correct
47 Correct 31 ms 11468 KB Output is correct
48 Correct 81 ms 9936 KB Output is correct
49 Correct 91 ms 9948 KB Output is correct
50 Correct 48 ms 10192 KB Output is correct
51 Correct 47 ms 10192 KB Output is correct
52 Correct 127 ms 9940 KB Output is correct
53 Correct 120 ms 9688 KB Output is correct
54 Correct 82 ms 9676 KB Output is correct