Submission #530339

#	Time	Username	Problem	Language	Result	Execution time	Memory
530339		abc864197532	Lottery (CEOI18_lot)	C++17	100 / 100	1844 ms	8356 KiB

lot

#include <bits/stdc++.h>
using namespace std;
#define lli long long int
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define X first
#define Y second
#define pii pair<int,int>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
void abc() {cout << endl;}
template <typename T, typename ...U> void abc(T i, U ...j) {
	cout << i << ' ', abc(j...);
}
template <typename T> void printv(T l, T r) {
	for (; l != r; ++l)
		cout << *l << " \n"[l + 1 == r];
}
#ifdef Doludu
#define test(x...) abc("[" + string(#x) + "]", x);
#define owo freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#else
#define test(x...) void(0);
#define owo ios::sync_with_stdio(false), cin.tie(0)
#endif
const int N = 200000;

int main () {
	owo;
	int n, len;
	cin >> n >> len;
	vector <int> v(n);
	for (int i = 0; i < n; ++i)
		cin >> v[i];
	int q;
	cin >> q;
	vector <int> queries(q);
	vector <vector <int>> ans(q, vector <int>(n - len + 1));
	for (int i = 0; i < q; ++i)
		cin >> queries[i];
	vector <int> id(q);
	iota(all(id), 0), sort(all(id), [&](int i, int j) {
		return queries[i] < queries[j];
	});
	vector <int> res;
	for (int d = 1; len + d <= n; ++d) {
		res.assign(n + 1, 0);
		int bound = max(n - d - len + 1, 0);
		for (int a = 0; a + d <= n; ++a) {
			int b = a + d;
			if (v[a] != v[b])
				continue;
			// x + i = a, y + i = b, a - len < st <= a
			// y - x = b - a
			// a - len + 1 <= st < a + 1
			res[max(a - len + 1, 0)]++;
			res[min(a + 1, bound)]--;
		}
		vector <int> cnt(n + 1, 0), ord(n - d - len + 1);
		for (int i = 1; i + d + len <= n; ++i)
			res[i] += res[i - 1];
		for (int i = 0; i + d + len <= n; ++i)
			cnt[res[i]]++;
		for (int i = 1; i <= n; ++i)
			cnt[i] += cnt[i - 1];
		for (int i = 0; i + d + len <= n; ++i) {
			ord[--cnt[res[i]]] = i;
		}
		for (int i = n - d - len, j = 0; j < q; ++j) {
			while (~i && res[ord[i]] >= len - queries[id[j]])
				ans[id[j]][ord[i]]++, ans[id[j]][ord[i] + d]++, i--;
		}
	}
	for (int i = 1; i < q; ++i) {
		for (int j = 0; j + len <= n; ++j)
			ans[id[i]][j] += ans[id[i - 1]][j];
	}
	for (int i = 0; i < q; ++i)
		printv(all(ans[i]));
}

• Subtask 1: 25 / 25
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20