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Submission #1049854

# Submission time Handle Problem Language Result Execution time Memory
1049854 2024-08-09T05:46:56 Z shiomusubi496 Uplifting Excursion (BOI22_vault) C++17
20 / 100
 1677 ms 24184 KB 
#include <bits/stdc++.h>

#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define rep2(i, a, b) for (int i = (int)(a); i < (int)(b); ++i)
#define rrep(i, n) for (int i = (int)(n) - 1; i >= 0; --i)
#define rrep2(i, a, b) for (int i = (int)(b) - 1; i >= (int)(a); --i)
#define all(v) begin(v), end(v)
#define rall(v) rbegin(v), rend(v)

using namespace std;

using ll = long long;

template<class T, class U> bool chmin(T& a, const U& b) { return a > b ? a = b, true : false; }
template<class T, class U> bool chmax(T& a, const U& b) { return a < b ? a = b, true : false; }

using namespace std;

constexpr ll inf = 1e18;

int main() {
    int M; cin >> M;
    ll L; cin >> L;
    vector<ll> A(2 * M + 1);
    rep (i, 2 * M + 1) cin >> A[i];
    if (L < 0) {
        reverse(all(A));
        L = -L;
    }
    ll sml = 0, smr = 0;
    rep (i, 2 * M + 1) {
        if (i < M) sml += A[i] * (i - M);
        if (i > M) smr += A[i] * (i - M);
    }
    if (L < sml || smr < L) {
        puts("impossible");
        return 0;
    }
    vector<pair<int, ll>> B;
    rep (i, 2 * M + 1) {
        if (i == M) continue;
        if (A[i] == 0) continue;
        // if (A[i] > M) continue;
        B.emplace_back(i - M, A[i]);
    }
    vector<ll> dp(smr - sml + 1, -inf);
    dp[0 - sml] = 0;
    for (auto [x, y] : B) {
        int ax = abs(x);
        vector<ll> memo;
        vector<ll> res;
        deque<int> st;
        rep (i, ax) {
            // mod x ごとにスライド最大値の形になる
            memo.clear();
            for (int j = i; j <= smr - sml; j += ax) {
                memo.push_back(dp[j]);
            }
            res.assign(memo.size(), -inf);
            st.clear();
            if (x > 0) {
                rep (i, memo.size()) memo[i] -= i;
                rep (i, res.size()) {
                    while (!st.empty() && st.front() < i - y) st.pop_front();
                    while (!st.empty() && memo[st.back()] < memo[i]) st.pop_back();
                    st.push_back(i);
                    res[i] = memo[st.front()] + i;
                }
            }
            else {
                rep (i, memo.size()) memo[i] += i;
                rrep (i, res.size()) {
                    while (!st.empty() && st.front() > i + y) st.pop_front();
                    while (!st.empty() && memo[st.back()] < memo[i]) st.pop_back();
                    st.push_back(i);
                    res[i] = memo[st.front()] - i;
                }
            }
            rep (j, res.size()) dp[j * ax + i] = res[j];
        }
    }
    if (dp[L - sml] >= 0) {
        cout << dp[L - sml] + A[M] << endl;
    }
    else {
        puts("impossible");
    }
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 48 ms 2372 KB Output is correct
7 Correct 10 ms 856 KB Output is correct
8 Correct 50 ms 1972 KB Output is correct
9 Correct 89 ms 3428 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 48 ms 2372 KB Output is correct
7 Correct 10 ms 856 KB Output is correct
8 Correct 50 ms 1972 KB Output is correct
9 Correct 89 ms 3428 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 50 ms 2352 KB Output is correct
18 Correct 9 ms 860 KB Output is correct
19 Correct 44 ms 1948 KB Output is correct
20 Correct 90 ms 3316 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 788 ms 12356 KB Output is correct
25 Correct 116 ms 2392 KB Output is correct
26 Correct 1491 ms 24184 KB Output is correct
27 Correct 1677 ms 23900 KB Output is correct
28 Correct 0 ms 604 KB Output is correct
29 Correct 1 ms 348 KB Output is correct

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Runtime error 1 ms 604 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Runtime error 1 ms 604 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Runtime error 1 ms 604 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 48 ms 2372 KB Output is correct
7 Correct 10 ms 856 KB Output is correct
8 Correct 50 ms 1972 KB Output is correct
9 Correct 89 ms 3428 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Runtime error 1 ms 604 KB Execution killed with signal 6
14 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Runtime error 1 ms 604 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 48 ms 2372 KB Output is correct
7 Correct 10 ms 856 KB Output is correct
8 Correct 50 ms 1972 KB Output is correct
9 Correct 89 ms 3428 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 50 ms 2352 KB Output is correct
18 Correct 9 ms 860 KB Output is correct
19 Correct 44 ms 1948 KB Output is correct
20 Correct 90 ms 3316 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 788 ms 12356 KB Output is correct
25 Correct 116 ms 2392 KB Output is correct
26 Correct 1491 ms 24184 KB Output is correct
27 Correct 1677 ms 23900 KB Output is correct
28 Correct 0 ms 604 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Runtime error 1 ms 604 KB Execution killed with signal 6
32 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Runtime error 1 ms 604 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 48 ms 2372 KB Output is correct
7 Correct 10 ms 856 KB Output is correct
8 Correct 50 ms 1972 KB Output is correct
9 Correct 89 ms 3428 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 50 ms 2352 KB Output is correct
18 Correct 9 ms 860 KB Output is correct
19 Correct 44 ms 1948 KB Output is correct
20 Correct 90 ms 3316 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 788 ms 12356 KB Output is correct
25 Correct 116 ms 2392 KB Output is correct
26 Correct 1491 ms 24184 KB Output is correct
27 Correct 1677 ms 23900 KB Output is correct
28 Correct 0 ms 604 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Runtime error 1 ms 604 KB Execution killed with signal 6
32 Halted 0 ms 0 KB -