oj.uz

답안 #373726

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
373726 2021-03-05T14:00:19 Z KoD Fireworks (APIO16_fireworks) C++17
100 / 100
 1186 ms 99180 KB 
#include <bits/stdc++.h>

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

template <class F>
struct RecLambda: private F {
    explicit RecLambda(F &&f): F(std::forward<F>(f)) { }
    template <class... Args>
    decltype(auto) operator () (Args&&... args) const {
        return F::operator()(*this, std::forward<Args>(args)...);        
    }
};

struct HeapNode;
using Heap = std::unique_ptr<HeapNode>;

struct HeapNode {
    ll value;
    Heap left, right;
    int height;
    HeapNode(const ll value): value(value), left(), right(), height() { }
};

Heap merge(Heap left, Heap right) {
    if (!left) return right;
    if (!right) return left;
    if (left -> value < right -> value) {
        std::swap(left, right);
    }
    left -> right = merge(std::move(left -> right), std::move(right));
    if (!(left -> left) || left -> left -> height < left -> right -> height) {
        std::swap(left -> left, left -> right);
    }
    left -> height = (left -> right ? left -> right -> height : 0) + 1;
    return left;
}

void push(Heap &heap, const ll value) {
    heap = merge(std::move(heap), std::make_unique<HeapNode>(value));
}

ll top(Heap &heap) {
    return heap -> value;
}

ll pop(Heap &heap) {
    const auto ret = top(heap);
    heap = merge(std::move(heap -> left), std::move(heap -> right));
    return ret;
}

struct SlopeTrick {
    ll last_slope, last_y;
    Heap changes;

    SlopeTrick(): last_slope(), last_y(), changes() { 
        push(changes, 0);
    }
    
    void absorb(SlopeTrick &&other) {
        const auto x1 = top(changes);
        const auto x2 = top(other.changes);
        last_y += other.last_y + (x1 < x2 ? last_slope * (x2 - x1) : other.last_slope * (x1 - x2));
        last_slope += other.last_slope;
        changes = merge(std::move(changes), std::move(other.changes));
    }

    bool pop_last() {
        const auto x1 = pop(changes);
        if (!changes) return false;
        const auto x2 = top(changes);
        last_slope -= 1;
        last_y += last_slope * (x2 - x1);
        return true;
    }
};

int main() {
    int N, M;
    std::cin >> N >> M;
    Vec<Vec<std::pair<int, int>>> children(N + M);
    for (int i = 1; i < N + M; ++i) {
        int p, c;
        std::cin >> p >> c;
        p -= 1;
        children[p].emplace_back(i, c);
    }
    Vec<SlopeTrick> data(N);
    RecLambda([&](auto dfs, const int u) -> void {
        for (const auto [v, c]: children[u]) {
            if (v >= N) {
                SlopeTrick trick;
                trick.last_slope = 1;
                push(trick.changes, c);
                push(trick.changes, c);
                data[u].absorb(std::move(trick));
            }
            else {
                dfs(v);
                while (data[v].last_slope > 1) {
                    data[v].pop_last();
                }
                const auto x1 = pop(data[v].changes);
                const auto x2 = pop(data[v].changes);
                push(data[v].changes, x2 + c);
                push(data[v].changes, x1 + c);
                data[u].absorb(std::move(data[v]));
            }
        }
    })(0);
    ll ans = data[0].last_y;
    while (data[0].pop_last()) {
        ans = std::min(ans, data[0].last_y);
    }
    std::cout << ans << '\n';
    return 0;    
}

Subtask #1
7.0 / 7.0

# 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 364 KB Output is correct
7 Correct 1 ms 364 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
19.0 / 19.0

# 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 364 KB Output is correct
7 Correct 1 ms 364 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 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct

Subtask #3
29.0 / 29.0

# 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 364 KB Output is correct
7 Correct 1 ms 364 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 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 2 ms 492 KB Output is correct
32 Correct 3 ms 492 KB Output is correct
33 Correct 4 ms 620 KB Output is correct
34 Correct 5 ms 748 KB Output is correct
35 Correct 5 ms 876 KB Output is correct
36 Correct 6 ms 876 KB Output is correct
37 Correct 7 ms 1004 KB Output is correct
38 Correct 8 ms 1004 KB Output is correct
39 Correct 7 ms 1004 KB Output is correct
40 Correct 8 ms 2028 KB Output is correct
41 Correct 8 ms 2028 KB Output is correct
42 Correct 7 ms 1004 KB Output is correct
43 Correct 8 ms 1516 KB Output is correct
44 Correct 8 ms 1388 KB Output is correct
45 Correct 8 ms 1388 KB Output is correct
46 Correct 9 ms 1004 KB Output is correct
47 Correct 8 ms 1004 KB Output is correct
48 Correct 8 ms 748 KB Output is correct
49 Correct 9 ms 1004 KB Output is correct
50 Correct 8 ms 1004 KB Output is correct
51 Correct 8 ms 1132 KB Output is correct
52 Correct 8 ms 1004 KB Output is correct
53 Correct 9 ms 1004 KB Output is correct
54 Correct 10 ms 1260 KB Output is correct

Subtask #4
45.0 / 45.0

# 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 364 KB Output is correct
7 Correct 1 ms 364 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 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 2 ms 492 KB Output is correct
32 Correct 3 ms 492 KB Output is correct
33 Correct 4 ms 620 KB Output is correct
34 Correct 5 ms 748 KB Output is correct
35 Correct 5 ms 876 KB Output is correct
36 Correct 6 ms 876 KB Output is correct
37 Correct 7 ms 1004 KB Output is correct
38 Correct 8 ms 1004 KB Output is correct
39 Correct 7 ms 1004 KB Output is correct
40 Correct 8 ms 2028 KB Output is correct
41 Correct 8 ms 2028 KB Output is correct
42 Correct 7 ms 1004 KB Output is correct
43 Correct 8 ms 1516 KB Output is correct
44 Correct 8 ms 1388 KB Output is correct
45 Correct 8 ms 1388 KB Output is correct
46 Correct 9 ms 1004 KB Output is correct
47 Correct 8 ms 1004 KB Output is correct
48 Correct 8 ms 748 KB Output is correct
49 Correct 9 ms 1004 KB Output is correct
50 Correct 8 ms 1004 KB Output is correct
51 Correct 8 ms 1132 KB Output is correct
52 Correct 8 ms 1004 KB Output is correct
53 Correct 9 ms 1004 KB Output is correct
54 Correct 10 ms 1260 KB Output is correct
55 Correct 20 ms 2028 KB Output is correct
56 Correct 79 ms 6636 KB Output is correct
57 Correct 152 ms 10988 KB Output is correct
58 Correct 204 ms 13932 KB Output is correct
59 Correct 283 ms 18412 KB Output is correct
60 Correct 375 ms 22636 KB Output is correct
61 Correct 430 ms 25836 KB Output is correct
62 Correct 493 ms 28412 KB Output is correct
63 Correct 588 ms 33644 KB Output is correct
64 Correct 661 ms 35564 KB Output is correct
65 Correct 475 ms 99180 KB Output is correct
66 Correct 497 ms 99124 KB Output is correct
67 Correct 462 ms 38252 KB Output is correct
68 Correct 625 ms 67436 KB Output is correct
69 Correct 659 ms 63212 KB Output is correct
70 Correct 660 ms 63212 KB Output is correct
71 Correct 854 ms 39148 KB Output is correct
72 Correct 831 ms 39148 KB Output is correct
73 Correct 863 ms 38892 KB Output is correct
74 Correct 873 ms 38892 KB Output is correct
75 Correct 872 ms 38228 KB Output is correct
76 Correct 877 ms 38508 KB Output is correct
77 Correct 940 ms 37736 KB Output is correct
78 Correct 1035 ms 38628 KB Output is correct
79 Correct 1186 ms 52052 KB Output is correct