oj.uz

답안 #592184

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
592184 2022-07-08T17:52:08 Z tutis Uplifting Excursion (BOI22_vault) C++17
0 / 100
 6 ms 7764 KB 
/*input
1 5
0 0 6

*/

#pragma GCC optimize ("O3")
#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
using namespace __gnu_pbds;
template <typename T>
using oset = tree<T,  null_type,  less<T>,  rb_tree_tag,  tree_order_statistics_node_update>;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
mt19937_64 rng(0);
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	ll M;
	ll L;
	cin >> M >> L;
	ll A_[2 * M + 1];
	ll* A = A_ + M;
	for (ll i = -M; i <= M; i++)
		cin >> A[i];
	L = -L;
	ll cnt = 0;
	for (ll l = -M; l <= M; l++)
	{
		L += l * A[l];
		cnt += A[l];
	}
	A[0] = 0;
	ld L_ = L;
	ld C_[2 * M + 1];
	ld* C = C_ + M;
	C[0] = 0;
	ll sum[M + 2];
	for (ll x = M; x >= 1; x--)
	{
		for (ll v : {x, -x})
		{
			C[v] = L_ / v;
			C[v] = max(ld(0), C[v]);
			C[v] = min(ld(A[v]), C[v]);
			L_ -= C[v] * v;
		}
		sum[x] = (ll)roundl(L_);
	}
	sum[0] = 0;
	sum[M + 1] = L;
	const ll mxdel = 40000;
	ll infi = 2e18;
	ll ej[M + 2][2 * mxdel + 1];
	for (ll a = 0; a <= M + 1; a++)
		for (ll b = 0; b <= 2 * mxdel; b++)
			ej[a][b] = infi;
	ej[M + 1][0 + mxdel] = 0;
	for (ll x = M; x >= 0; x--)
	{
		for (ll v : {x, -x})
		{
			for (ll a = -mxdel; a <= mxdel; a++)
			{
				ll val = sum[x + 1] + a - sum[x] + mxdel;
				ll e = ej[x + 1][a + mxdel];
				if (e == infi)
					continue;
				ll opt = 0;
				if (x != 0)
					opt = val / v;
				opt = max(opt, 0ll);
				opt = min(opt, A[v]);
				for (ll k = max(0ll, opt - x - 5); k <= min(A[v], opt + x + 5); k++)
				{
					ll val_ = val - k * v;
					ll e_ = e + k;
					if (0 <= val_ && val_ <= 2 * mxdel)
						if (e_ < ej[x][val_])
							ej[x][val_] = e_;
				}
			}
		}
	}
	ll best = ej[0][mxdel];
	if (best != infi)
		cout << cnt - best << "\n";
	else
		cout << "impossible\n";
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 3 ms 3412 KB Output is correct
3 Correct 2 ms 2132 KB Output is correct
4 Incorrect 5 ms 7764 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 3 ms 3412 KB Output is correct
3 Correct 2 ms 2132 KB Output is correct
4 Incorrect 5 ms 7764 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 7764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 7764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 7764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 3 ms 3412 KB Output is correct
3 Correct 2 ms 2132 KB Output is correct
4 Incorrect 5 ms 7764 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 7764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 3 ms 3412 KB Output is correct
3 Correct 2 ms 2132 KB Output is correct
4 Incorrect 5 ms 7764 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 6 ms 7764 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 3 ms 3412 KB Output is correct
3 Correct 2 ms 2132 KB Output is correct
4 Incorrect 5 ms 7764 KB Output isn't correct
5 Halted 0 ms 0 KB -