Submission #506395

#	Time	Username	Problem	Language	Result	Execution time	Memory
506395		Elegia	The short shank; Redemption (BOI21_prison)	C++17	0 / 100	53 ms	8288 KiB

prison

#include <cmath>

#include <algorithm>
#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 t[_], a[_];

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];
	int lst = N, ans = 0;
	for (int i = N; i; --i) if (t[i] <= T) {
		a[++ans] = min(T - t[i], lst - i);
		lst = i - 1;
	}
	if (ans) {
		D = min(D, ans);
		nth_element(a + 1, a + D, a + ans + 1, greater<int>());
		ans += accumulate(a + D + 1, a + ans + 1, 0);
	}
	cout << ans << '\n';

	return 0;
}

• Subtask 1: 0 / 15
• Subtask 2: 0 / 10
• Subtask 3: 0 / 20
• Subtask 4: 0 / 10
• Subtask 5: 0 / 25
• Subtask 6: 0 / 20