oj.uz

답안 #721677

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
721677 2023-04-11T06:30:13 Z The_Samurai Uplifting Excursion (BOI22_vault) C++17
0 / 100
 2 ms 4308 KB 
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2")
#include "bits/stdc++.h"

using namespace std;
using ll = long long;
int INF = 1e9;

void solve() {
    int n, zero = 0;
    ll l;
    cin >> n >> l;
    vector<ll> a(n + 1), b(n + 1);
    for (int i = 0; i < n; i++)
        cin >> b[n - i];
    cin >> zero;
    for (int i = 1; i <= n; i++)
        cin >> a[i];
    if (l < 0) {
        swap(a, b);
        l = -l;
    }
    if (*max_element(a.begin(), a.end()) <= 100) {
        int N = 5e5 + 1e4, ans = 0;
        vector<int> dp_plus(N, -INF), dp_minus(N, -INF);
        dp_plus[0] = dp_minus[0] = 0;
        if (l > N) {
            cout << "impossible";
            return;
        }
        int sum1 = 0, sum2 = 0;
        for (int i = 1; i <= n; i++) {
            sum1 += a[i] * i;
            sum2 += b[i] * i;
            for (int j = sum1; j >= i; j--) {
                for (int k = 1; k <= a[i] and i * k <= j; k++) {
                    if (dp_plus[j - i * k] >= 0) {
                        dp_plus[j] = max(dp_plus[j], dp_plus[j - i * k] + k);
                        break;
                    }
                }
            }
            for (int j = sum2; j >= i; j--) {
                for (int k = 1; k <= b[i] and i * k <= j; k++) {
                    if (dp_minus[j - i * k] >= 0) {
                        dp_minus[j] = max(dp_minus[j], dp_minus[j - i * k] + k);
                        break;
                    }
                }
            }
        }
        for (int i = sum1; i >= max(l, (ll)sum1 - 100); i--) {
            ans = max(ans, dp_plus[sum1] + dp_minus[sum1 - l]);
        }
        if (ans == 0) cout << "impossible";
        else cout << ans + zero;
        return;
    }

}

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

    int queries = 1;
#ifdef test_cases
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
//    cin >> queries;
#else
//    cin >> queries;
#endif

    for (int test_case = 1; test_case <= queries; test_case++) {
        solve();
//        cout << '\n';
    }
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Incorrect 2 ms 4308 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Incorrect 2 ms 4308 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 4308 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 2 ms 4308 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 2 ms 4308 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 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Incorrect 2 ms 4308 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 4308 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 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Incorrect 2 ms 4308 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 4308 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 4308 KB Output is correct
2 Correct 2 ms 4308 KB Output is correct
3 Incorrect 2 ms 4308 KB Output isn't correct
4 Halted 0 ms 0 KB -