oj.uz

답안 #336394

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
336394 2020-12-15T07:48:53 Z KoD 3단 점프 (JOI19_jumps) C++17
46 / 100
 416 ms 104684 KB 
#include <bits/stdc++.h>

using i32 = std::int32_t;
using i64 = std::int64_t;
using u32 = std::uint32_t;
using u64 = std::uint64_t;
using isize = std::ptrdiff_t;
using usize = std::size_t;

template <class T>
using Vec = std::vector<T>;

constexpr i32 inf32 = (u32) ~0 >> 2;
constexpr i64 inf64 = (u64) ~0 >> 2;

int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    usize N;
    std::cin >> N;
    Vec<u32> A(N);
    for (auto &x: A) {
        std::cin >> x;
    }
    usize Q;
    std::cin >> Q;
    if (Q <= 20) {
        while (Q--) {
            usize L, R;
            std::cin >> L >> R;
            L -= 1;
            R -= 1;
            std::stack<std::pair<u32, usize>> stack;
            Vec<u32> accum(N);
            accum[R] = A[R];
            for (usize i = R; i --> L;) {
                accum[i] = std::max(A[i], accum[i + 1]);
            }
            u32 ans = 0;
            for (usize m = L; m < R; ++m) {
                while (!stack.empty()) {
                    const auto [v, i] = stack.top();
                    if (m + m - i <= R) {
                        ans = std::max(ans, v + A[m] + accum[m + m - i]);
                    }
                    if (v > A[m]) {
                        break;
                    }
                    stack.pop();
                }
                stack.emplace(A[m], m);
            }
            std::cout << ans << '\n';
        }
    }
    else if (N <= 5000) {
        Vec<Vec<u32>> dp(N, Vec<u32>(N, 0));
        for (usize l = 0; l < N; ++l) {
            u32 m = 0;
            for (usize r = l + 2; r < N; ++r) {
                m = std::max(m, A[(l + r) / 2]);
                dp[l][r] = A[l] + m + A[r];
            }
        }
        for (usize len = 2; len < N; ++len) {
            for (usize l = 0; l + len < N; ++l) {
                dp[l][l + len] = std::max({ dp[l][l + len], dp[l + 1][l + len], dp[l][l + len - 1] }); 
            }
        }
        while (Q--) {
            usize l, r;
            std::cin >> l >> r;
            l -= 1;
            r -= 1;
            std::cout << dp[l][r] << '\n';
        }
    }
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 402 ms 104684 KB Output is correct
12 Correct 409 ms 104428 KB Output is correct
13 Correct 395 ms 104512 KB Output is correct
14 Correct 400 ms 104604 KB Output is correct
15 Correct 401 ms 104684 KB Output is correct
16 Correct 396 ms 104088 KB Output is correct
17 Correct 393 ms 103916 KB Output is correct
18 Correct 416 ms 103964 KB Output is correct
19 Correct 402 ms 104556 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 3096 KB Output is correct
2 Correct 21 ms 3692 KB Output is correct
3 Correct 25 ms 6892 KB Output is correct
4 Correct 24 ms 3692 KB Output is correct
5 Correct 24 ms 3692 KB Output is correct
6 Correct 20 ms 3052 KB Output is correct
7 Correct 19 ms 2924 KB Output is correct
8 Correct 19 ms 2924 KB Output is correct
9 Correct 21 ms 3180 KB Output is correct

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 402 ms 104684 KB Output is correct
12 Correct 409 ms 104428 KB Output is correct
13 Correct 395 ms 104512 KB Output is correct
14 Correct 400 ms 104604 KB Output is correct
15 Correct 401 ms 104684 KB Output is correct
16 Correct 396 ms 104088 KB Output is correct
17 Correct 393 ms 103916 KB Output is correct
18 Correct 416 ms 103964 KB Output is correct
19 Correct 402 ms 104556 KB Output is correct
20 Correct 24 ms 3096 KB Output is correct
21 Correct 21 ms 3692 KB Output is correct
22 Correct 25 ms 6892 KB Output is correct
23 Correct 24 ms 3692 KB Output is correct
24 Correct 24 ms 3692 KB Output is correct
25 Correct 20 ms 3052 KB Output is correct
26 Correct 19 ms 2924 KB Output is correct
27 Correct 19 ms 2924 KB Output is correct
28 Correct 21 ms 3180 KB Output is correct
29 Incorrect 50 ms 7020 KB Output isn't correct
30 Halted 0 ms 0 KB -