oj.uz

Submission #527942

# Submission time Handle Problem Language Result Execution time Memory
527942 2022-02-18T20:12:25 Z 1ne Izbori (COCI22_izbori) C++14
25 / 110
 3000 ms 3840 KB 
#include<iostream>
#include<algorithm>
#include<functional>
#include<numeric>
#include<vector>
#include<utility>
#include<map>
#include<set>
using namespace std;
long long merge(int left, int mid, int right, vector<int64_t>& arr) {
	vector<int64_t>temp;
	int i = left, j = mid + 1;
	long long ans = 0;
	while (i <= mid && j <= right) {
		if (arr[i] <= arr[j]) {
			temp.push_back(arr[i]);
			++i;
		}
		else {
			temp.push_back(arr[j]);
			++j;
		}
	}
	while (i <= mid) {
		temp.push_back(arr[i]);
		++i;
	}
	while (j <= right) {
		temp.push_back(arr[j]);
		++j;
	}
	for (auto x : temp) {
		arr[left] = x;
		++left;
	}
	return ans;
}
long long mergesort(int left, int right, vector<int64_t>& arr) {
	int mid = (left + right) >> 1;
	if (left >= right)return 0;
	long long ans = 0;
	ans += mergesort(left, mid, arr);
	ans += mergesort(mid + 1, right, arr);
	ans += merge(left, mid, right, arr);
	return ans;
}
int main() {
	int n;cin >> n;
	vector<int>arr(n);
	bool ok = true;
	for (int i = 0;i < n;++i) {
		cin >> arr[i];
		if (arr[i] > 1)ok = false;
	}
	if (ok) {
		vector<vector<int64_t>>freq(2, vector<int64_t>(n, 0));
		for (int i = 0;i < n;++i) {
			freq[arr[i]][i]++;
			if (i == 0)continue;
			freq[0][i] += freq[0][i-1];
			freq[1][i] += freq[1][i-1];
		}
		int64_t ans = mergesort(0, n - 1, freq[0]) + mergesort(0, n - 1, freq[1]);
		cout << ans << '\n';
		return 0;
	}
	int64_t ans = n;
	arr.push_back(-1);
	for (int i = 2;i <= n;++i) {
		map<int, int>freq;
		multiset < pair<int, int>, greater<pair<int, int>>>mp;
		for (int j = 0;j < i;++j) {
			freq[arr[j]]++;
		}
		for (auto x : freq) {
			mp.insert({ x.second,x.first });
		}
		for (int j = 0;j <= n - i;++j) {
			auto x = *mp.begin();
			if (x.first > i / 2) {
				ans++;
			}
			mp.erase({ freq[arr[j]],arr[j] });
			freq[arr[j]]--;
			mp.insert({ freq[arr[j]],arr[j] });
			freq[arr[j + i]]++;
			mp.insert({ freq[arr[j + i]],arr[j + i] });
		}
	}
	cout << ans << '\n';

}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 16 ms 304 KB Output is correct
4 Correct 15 ms 300 KB Output is correct
5 Correct 15 ms 300 KB Output is correct
6 Correct 8 ms 204 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 16 ms 304 KB Output is correct
4 Correct 15 ms 300 KB Output is correct
5 Correct 15 ms 300 KB Output is correct
6 Correct 8 ms 204 KB Output is correct
7 Correct 399 ms 364 KB Output is correct
8 Correct 4 ms 204 KB Output is correct
9 Correct 871 ms 372 KB Output is correct
10 Correct 874 ms 368 KB Output is correct
11 Correct 900 ms 368 KB Output is correct
12 Correct 868 ms 368 KB Output is correct
13 Correct 849 ms 368 KB Output is correct
14 Correct 843 ms 376 KB Output is correct
15 Correct 837 ms 368 KB Output is correct
16 Correct 844 ms 368 KB Output is correct
17 Correct 332 ms 380 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Execution timed out 3028 ms 3840 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 288 KB Output is correct
3 Correct 16 ms 304 KB Output is correct
4 Correct 15 ms 300 KB Output is correct
5 Correct 15 ms 300 KB Output is correct
6 Correct 8 ms 204 KB Output is correct
7 Correct 399 ms 364 KB Output is correct
8 Correct 4 ms 204 KB Output is correct
9 Correct 871 ms 372 KB Output is correct
10 Correct 874 ms 368 KB Output is correct
11 Correct 900 ms 368 KB Output is correct
12 Correct 868 ms 368 KB Output is correct
13 Correct 849 ms 368 KB Output is correct
14 Correct 843 ms 376 KB Output is correct
15 Correct 837 ms 368 KB Output is correct
16 Correct 844 ms 368 KB Output is correct
17 Correct 332 ms 380 KB Output is correct
18 Execution timed out 3028 ms 3840 KB Time limit exceeded
19 Halted 0 ms 0 KB -