Submission #508762

#TimeUsernameProblemLanguageResultExecution timeMemory
508762ElegiaThe short shank; Redemption (BOI21_prison)C++17
0 / 100
154 ms83816 KiB
#include <cmath>

#include <algorithm>
#include <stack>
#include <bitset>
#include <numeric>
#include <iostream>
#include <vector>
#include <string>
#include <set>
#include <queue>
#include <map>
#include <unordered_map>

using ull = unsigned long long;

using namespace std;

// const int P = 998244353;

// int norm(int x) { return x >= P ? x - P : x; }
// int reduce(int x) { return x < 0 ? x + P : x; }
// int neg(int x) { return x ? P - x : 0; }
// void add(int& x, int y) { if ((x += y - P) < 0) x += P; }
// void sub(int& x, int y) { if ((x -= y) < 0) x += P; }
// void fam(int& x, int y, int z) { x = (x + y * (ull)z) % P; }
// int mpow(int x, unsigned k) {
// 	if (k == 0) return 1;
// 	int ret = mpow(x * (ull)x % P, k >> 1);
// 	if (k & 1) ret = ret * (ull)x % P;
// 	return ret;
// }
// int quo2(int x) { return ((x & 1) ? x + P : x) >> 1; }

const int _ = 2000010;

int ans;
int t[_], l[_], r[_];
priority_queue<int> q[_];

void mer(priority_queue<int>& P, priority_queue<int>& Q) {
	if (P.size() < Q.size()) swap(P, Q);
	while (!Q.empty()) { P.push(Q.top()); Q.pop(); }
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr); cout.tie(nullptr);

	int N, D, T; cin >> N >> D >> T;
	for (int i = 1; i <= N; ++i) cin >> t[i];
	stack<int> stk;
	for (int i = N; i; --i) {
		if (t[i] > T) continue;
		++ans;
		int lst = l[ans] = i;
		r[ans] = min(N, i + T - t[i]);
		q[ans].push(0);
		while (true) {
			if (!stk.empty() && r[ans] >= r[stk.top()]) {
				int p = stk.top();
				stk.pop();
				int v = q[ans].top() + l[p] - lst - 1;
				q[ans].pop(); q[ans].push(v);
				mer(q[ans], q[p]); lst = r[p];
			} else {
				if (!stk.empty()) r[ans] = l[stk.top()] - 1;
				int v = q[ans].top() + r[ans] - lst;
				q[ans].pop(); q[ans].push(v);
				break;
			}
		}
		stk.push(ans);
	}
	while (!stk.empty()) { mer(q[0], q[stk.top()]); stk.pop(); }
	while (D-- && !q[0].empty()) q[0].pop();
	while (!q[0].empty()) { ans += q[0].top(); q[0].pop(); }
	cout << ans << '\n';

	return 0;
}
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...