oj.uz

답안 #527946

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
527946 2022-02-18T20:16:39 Z 1ne Izbori (COCI22_izbori) C++14
25 / 110
 865 ms 4888 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] > 2)ok = false;
		arr[i]--;
	}
	if (ok) {
		int64_t ans = 0;
		vector<int64_t>freq(n, 0);
		for (int i = 0;i < n;++i) {
			if (arr[i] == 0) {
				freq[i]++;
			}
			else freq[i]--;
			if (i == 0)continue;
			freq[i] += freq[i - 1];
		}
		ans += mergesort(0, n - 1, freq);
		for (int i = 0;i < n;++i) {
			freq[i] = 0;
		}
		for (int i = 0;i < n;++i) {
			if (arr[i] == 0) {
				freq[i]--;
			}
			else freq[i]++;
			if (i == 0)continue;
			freq[i] += freq[i - 1];
		}
		ans += mergesort(0, n - 1, freq);
		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

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 16 ms 204 KB Output is correct
4 Correct 15 ms 304 KB Output is correct
5 Correct 15 ms 300 KB Output is correct
6 Correct 8 ms 300 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 16 ms 204 KB Output is correct
4 Correct 15 ms 304 KB Output is correct
5 Correct 15 ms 300 KB Output is correct
6 Correct 8 ms 300 KB Output is correct
7 Correct 393 ms 360 KB Output is correct
8 Correct 4 ms 204 KB Output is correct
9 Correct 845 ms 364 KB Output is correct
10 Correct 828 ms 360 KB Output is correct
11 Correct 827 ms 360 KB Output is correct
12 Correct 865 ms 360 KB Output is correct
13 Correct 809 ms 452 KB Output is correct
14 Correct 826 ms 364 KB Output is correct
15 Correct 815 ms 368 KB Output is correct
16 Correct 822 ms 376 KB Output is correct
17 Correct 342 ms 372 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 61 ms 4888 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 70.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 16 ms 204 KB Output is correct
4 Correct 15 ms 304 KB Output is correct
5 Correct 15 ms 300 KB Output is correct
6 Correct 8 ms 300 KB Output is correct
7 Correct 393 ms 360 KB Output is correct
8 Correct 4 ms 204 KB Output is correct
9 Correct 845 ms 364 KB Output is correct
10 Correct 828 ms 360 KB Output is correct
11 Correct 827 ms 360 KB Output is correct
12 Correct 865 ms 360 KB Output is correct
13 Correct 809 ms 452 KB Output is correct
14 Correct 826 ms 364 KB Output is correct
15 Correct 815 ms 368 KB Output is correct
16 Correct 822 ms 376 KB Output is correct
17 Correct 342 ms 372 KB Output is correct
18 Incorrect 61 ms 4888 KB Output isn't correct
19 Halted 0 ms 0 KB -