oj.uz

답안 #655419

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
655419 2022-11-04T10:15:26 Z piOOE 3단 점프 (JOI19_jumps) C++17
5 / 100
 2934 ms 14944 KB 
#include <bits/stdc++.h>

using namespace std;

constexpr int inf = 1e9 + 7;

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

    int n;
    cin >> n;

    vector<int> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }

    auto func = [&](int i, int j) {
        return a[i] > a[j] ? i : j;
    };

    const int max_log = __lg(n) + bool(n & (n - 1));
    vector<vector<int>> st(max_log);
    st[0].resize(n);
    iota(st[0].begin(), st[0].end(), 0);
    for (int i = 1; i < max_log; ++i) {
        st[i].resize(n - (1 << i) + 1);
        for (int j = 0; j < (int) st[i].size(); ++j) {
            st[i][j] = func(st[i - 1][j], st[i - 1][j + (1 << (i - 1))]);
        }
    }

    vector<int> logn(n + 1);
    for (int i = 2; i <= n; ++i) {
        logn[i] = logn[i >> 1] + 1;
    }

    auto query = [&](int l, int r) {
        int lg = logn[r - l];
        return func(st[lg][l], st[lg][r - (1 << lg)]);
    };

    int q;
    cin >> q;
    while (q--) {
        int l, r;
        cin >> l >> r;
        --l;
        vector<int> p{l, r - 1};
        for (int t = 0; t < r - l && p.size() < 32; ++t) {
            int kek = -1;
            for (int i = 0; i < int(p.size()) - 1; ++i) {
                if (p[i + 1] != p[i] + 1) {
                    int d = query(p[i] + 1, p[i + 1]);
                    if (kek == -1 || a[d] > a[kek]) {
                        kek = d;
                    }
                }
            }
            if (kek == -1) {
                break;
            }
            p.insert(lower_bound(p.begin(), p.end(), kek), kek);
        }

        int ans = 0;

        auto relax = [&](int i, int j) {
            int R = j + (j - i);
            if (R < r) {
                ans = max(ans, a[i] + a[j] + a[query(R, r)]);
            }
            int len = j - i - 1;
            if (len > 0) {
                ans = max(ans, a[i] + a[j] + a[query(i + 1, i + 1 + ((len + 1) / 2))]);
            }
            int L = max(l, i - (j - i));
            if (L < i) {
                ans = max(ans, a[i] + a[j] + a[query(L, i)]);
            }
        };

        vector<int> stk;
        for (int i: p) {
            while (!stk.empty() && a[stk.back()] <= a[i]) {
                relax(stk.back(), i);
                stk.pop_back();
            }
            if (!stk.empty()) {
                relax(stk.back(), i);
            }
            stk.push_back(i);
        }

        cout << ans << '\n';
    }

    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 2934 ms 5928 KB Output is correct
12 Correct 974 ms 5532 KB Output is correct
13 Correct 958 ms 5580 KB Output is correct
14 Correct 2880 ms 5732 KB Output is correct
15 Correct 2828 ms 5692 KB Output is correct
16 Incorrect 2835 ms 9576 KB Output isn't correct
17 Halted 0 ms 0 KB -

Subtask #3
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 14900 KB Output is correct
2 Correct 26 ms 14924 KB Output is correct
3 Correct 24 ms 14944 KB Output is correct
4 Correct 26 ms 14936 KB Output is correct
5 Correct 27 ms 14904 KB Output is correct
6 Incorrect 23 ms 14940 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 316 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 2934 ms 5928 KB Output is correct
12 Correct 974 ms 5532 KB Output is correct
13 Correct 958 ms 5580 KB Output is correct
14 Correct 2880 ms 5732 KB Output is correct
15 Correct 2828 ms 5692 KB Output is correct
16 Incorrect 2835 ms 9576 KB Output isn't correct
17 Halted 0 ms 0 KB -