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Submission #573706

# Submission time Handle Problem Language Result Execution time Memory
573706 2022-06-07T05:46:18 Z eecs Uplifting Excursion (BOI22_vault) C++17
0 / 100
 5000 ms 212 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int m;
    ll L, all = 0;
    cin >> m >> L;
    vector<ll> _a(2 * m + 1), _b(2 * m + 1);
    auto a = _a.data() + m, b = _b.data() + m;
    for (int i = -m; i <= m; i++) {
        cin >> a[i], all += max(0, i) * a[i];
    }
    if (all < L) cout << "impossible\n", exit(0);
    ll ans = a[0];
    for (int i = -m; i < 0; i++) {
        b[i] = min(a[i], (all - L) / -i);
        ans += b[i], L -= b[i] * i, a[i] -= b[i];
    }
    for (int i = 1; i <= m; i++) {
        b[i] = min(a[i], L / i);
        ans += b[i], L -= b[i] * i, a[i] -= b[i];
    }
    int lim = m * L;
    vector<int> f(2 * lim + 1, -1e9);
    f[lim] = 0;
    for (int i = -m; i <= m; i++) if (i) {
        vector<int> g(2 * lim + 1, -1e9);
        for (int j = -lim; j <= lim; j++) if (f[lim + j] > -1e8) {
            for (int k = 0; k <= a[i]; k++) if (j + i * k >= -lim && j + i * k <= lim) {
                g[lim + j + i * k] = max(g[lim + j + i * k], f[lim + j] + k);
            }
            for (int k = 0; k <= b[i]; k++) if (j - i * k >= -lim && j - i * k <= lim) {
                g[lim + j - i * k] = max(g[lim + j - i * k], f[lim + j] - k);
            }
        }
        swap(f, g);
    }
    if (f[L + lim] < -1e8) cout << "impossible\n";
    else cout << ans + f[L + lim] << "\n";
    return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 5060 ms 212 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 5060 ms 212 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 5060 ms 212 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 5060 ms 212 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6-1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Execution timed out 5060 ms 212 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #6-2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -