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답안 #102499

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
102499 2019-03-25T11:37:59 Z Andrei1998 Designated Cities (JOI19_designated_cities) C++17
100 / 100
 1601 ms 94584 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long int lint;

const int NMAX = 200000 + 5;

int N;
set <int> tree[NMAX];
inline int parent(int node) { return *tree[node].begin(); }
map <lint, int> cost[NMAX];

lint ans[NMAX];

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

    cin >> N;
    for (int i = 1; i < N; ++i) {
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        tree[a].insert(b);
        tree[b].insert(a);
        cost[a][b] = c;
        cost[b][a] = d;
    }

    // E = 1
    lint sum = 0;
    function <void(int, int)> dfs_compute_from_1 = [&sum, &dfs_compute_from_1](const int node, const int father) {
        for (auto it: tree[node]) {
            if (it != father) {
                sum += cost[node][it];
                dfs_compute_from_1(it, node);
            }
        }
    };
    function <void(int, int)> dfs_compute = [&sum, &dfs_compute](const int node, const int father) {
        ans[1] = min(ans[1], sum);
        for (auto it: tree[node]) {
            if (it != father) {
                sum += cost[it][node] - cost[node][it];
                dfs_compute(it, node);
                sum -= cost[it][node] - cost[node][it];
            }
        }
    };
    dfs_compute_from_1(1, 0);
    ans[1] = sum;
    dfs_compute(1, 0);

    // E > 1
    priority_queue <pair <lint, int> > pq;
    for (int i = 1; i <= N; ++i) {
        if (tree[i].size() == 1) {
            pq.emplace(-cost[parent(i)][i], i);
        }
    }

    for (int i = pq.size(); i <= N; ++i) {
        ans[i] = 0;
    }

    int where = pq.size() - 1;
    while (where > 1) {
        int node; lint cst;
        tie(cst, node) = pq.top();
        cst = -cst;
        pq.pop();

        const int father = parent(node);
        tree[father].erase(node);
        if (tree[father].size() == 1) {
            pq.emplace(-(cst + cost[parent(father)][father]), father);
        } else {
            ans[where] = ans[where + 1] + cst;
            --where;
        }
    }

    int Q = 0;
    cin >> Q;
    for (int i = 1; i <= Q; ++i) {
        int E;
        cin >> E;
        cout << ans[E] << '\n';
    }
    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 19328 KB Output is correct
2 Correct 19 ms 19072 KB Output is correct
3 Correct 22 ms 19200 KB Output is correct
4 Correct 19 ms 19200 KB Output is correct
5 Correct 17 ms 19072 KB Output is correct
6 Correct 19 ms 19200 KB Output is correct
7 Correct 19 ms 19200 KB Output is correct
8 Correct 20 ms 19152 KB Output is correct
9 Correct 18 ms 19200 KB Output is correct
10 Correct 19 ms 19108 KB Output is correct
11 Correct 21 ms 19240 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 19072 KB Output is correct
2 Correct 926 ms 65948 KB Output is correct
3 Correct 725 ms 90112 KB Output is correct
4 Correct 827 ms 66016 KB Output is correct
5 Correct 1024 ms 66272 KB Output is correct
6 Correct 879 ms 69372 KB Output is correct
7 Correct 1286 ms 66900 KB Output is correct
8 Correct 740 ms 90864 KB Output is correct
9 Correct 1457 ms 67888 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 19072 KB Output is correct
2 Correct 882 ms 66136 KB Output is correct
3 Correct 743 ms 94200 KB Output is correct
4 Correct 846 ms 66016 KB Output is correct
5 Correct 1024 ms 66256 KB Output is correct
6 Correct 977 ms 69984 KB Output is correct
7 Correct 1446 ms 67564 KB Output is correct
8 Correct 800 ms 81560 KB Output is correct
9 Correct 1464 ms 67980 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 19328 KB Output is correct
2 Correct 19 ms 19072 KB Output is correct
3 Correct 22 ms 19200 KB Output is correct
4 Correct 19 ms 19200 KB Output is correct
5 Correct 17 ms 19072 KB Output is correct
6 Correct 19 ms 19200 KB Output is correct
7 Correct 19 ms 19200 KB Output is correct
8 Correct 20 ms 19152 KB Output is correct
9 Correct 18 ms 19200 KB Output is correct
10 Correct 19 ms 19108 KB Output is correct
11 Correct 21 ms 19240 KB Output is correct
12 Correct 21 ms 19204 KB Output is correct
13 Correct 23 ms 19584 KB Output is correct
14 Correct 24 ms 19960 KB Output is correct
15 Correct 21 ms 19584 KB Output is correct
16 Correct 22 ms 19712 KB Output is correct
17 Correct 22 ms 19584 KB Output is correct
18 Correct 29 ms 19616 KB Output is correct
19 Correct 23 ms 19584 KB Output is correct
20 Correct 24 ms 19584 KB Output is correct
21 Correct 25 ms 19712 KB Output is correct
22 Correct 22 ms 19712 KB Output is correct
23 Correct 23 ms 19584 KB Output is correct
24 Correct 22 ms 19712 KB Output is correct
25 Correct 24 ms 19840 KB Output is correct
26 Correct 25 ms 19712 KB Output is correct

Subtask #5
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 19072 KB Output is correct
2 Correct 926 ms 65948 KB Output is correct
3 Correct 725 ms 90112 KB Output is correct
4 Correct 827 ms 66016 KB Output is correct
5 Correct 1024 ms 66272 KB Output is correct
6 Correct 879 ms 69372 KB Output is correct
7 Correct 1286 ms 66900 KB Output is correct
8 Correct 740 ms 90864 KB Output is correct
9 Correct 1457 ms 67888 KB Output is correct
10 Correct 18 ms 19072 KB Output is correct
11 Correct 882 ms 66136 KB Output is correct
12 Correct 743 ms 94200 KB Output is correct
13 Correct 846 ms 66016 KB Output is correct
14 Correct 1024 ms 66256 KB Output is correct
15 Correct 977 ms 69984 KB Output is correct
16 Correct 1446 ms 67564 KB Output is correct
17 Correct 800 ms 81560 KB Output is correct
18 Correct 1464 ms 67980 KB Output is correct
19 Correct 20 ms 19200 KB Output is correct
20 Correct 1008 ms 66160 KB Output is correct
21 Correct 757 ms 94584 KB Output is correct
22 Correct 837 ms 66016 KB Output is correct
23 Correct 920 ms 66116 KB Output is correct
24 Correct 934 ms 66144 KB Output is correct
25 Correct 1050 ms 65968 KB Output is correct
26 Correct 1000 ms 66016 KB Output is correct
27 Correct 1102 ms 66144 KB Output is correct
28 Correct 972 ms 69432 KB Output is correct
29 Correct 953 ms 66272 KB Output is correct
30 Correct 1102 ms 66400 KB Output is correct
31 Correct 1526 ms 67296 KB Output is correct
32 Correct 908 ms 82664 KB Output is correct
33 Correct 1601 ms 68052 KB Output is correct

Subtask #6
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 19 ms 19328 KB Output is correct
2 Correct 19 ms 19072 KB Output is correct
3 Correct 22 ms 19200 KB Output is correct
4 Correct 19 ms 19200 KB Output is correct
5 Correct 17 ms 19072 KB Output is correct
6 Correct 19 ms 19200 KB Output is correct
7 Correct 19 ms 19200 KB Output is correct
8 Correct 20 ms 19152 KB Output is correct
9 Correct 18 ms 19200 KB Output is correct
10 Correct 19 ms 19108 KB Output is correct
11 Correct 21 ms 19240 KB Output is correct
12 Correct 19 ms 19072 KB Output is correct
13 Correct 926 ms 65948 KB Output is correct
14 Correct 725 ms 90112 KB Output is correct
15 Correct 827 ms 66016 KB Output is correct
16 Correct 1024 ms 66272 KB Output is correct
17 Correct 879 ms 69372 KB Output is correct
18 Correct 1286 ms 66900 KB Output is correct
19 Correct 740 ms 90864 KB Output is correct
20 Correct 1457 ms 67888 KB Output is correct
21 Correct 18 ms 19072 KB Output is correct
22 Correct 882 ms 66136 KB Output is correct
23 Correct 743 ms 94200 KB Output is correct
24 Correct 846 ms 66016 KB Output is correct
25 Correct 1024 ms 66256 KB Output is correct
26 Correct 977 ms 69984 KB Output is correct
27 Correct 1446 ms 67564 KB Output is correct
28 Correct 800 ms 81560 KB Output is correct
29 Correct 1464 ms 67980 KB Output is correct
30 Correct 21 ms 19204 KB Output is correct
31 Correct 23 ms 19584 KB Output is correct
32 Correct 24 ms 19960 KB Output is correct
33 Correct 21 ms 19584 KB Output is correct
34 Correct 22 ms 19712 KB Output is correct
35 Correct 22 ms 19584 KB Output is correct
36 Correct 29 ms 19616 KB Output is correct
37 Correct 23 ms 19584 KB Output is correct
38 Correct 24 ms 19584 KB Output is correct
39 Correct 25 ms 19712 KB Output is correct
40 Correct 22 ms 19712 KB Output is correct
41 Correct 23 ms 19584 KB Output is correct
42 Correct 22 ms 19712 KB Output is correct
43 Correct 24 ms 19840 KB Output is correct
44 Correct 25 ms 19712 KB Output is correct
45 Correct 20 ms 19200 KB Output is correct
46 Correct 1008 ms 66160 KB Output is correct
47 Correct 757 ms 94584 KB Output is correct
48 Correct 837 ms 66016 KB Output is correct
49 Correct 920 ms 66116 KB Output is correct
50 Correct 934 ms 66144 KB Output is correct
51 Correct 1050 ms 65968 KB Output is correct
52 Correct 1000 ms 66016 KB Output is correct
53 Correct 1102 ms 66144 KB Output is correct
54 Correct 972 ms 69432 KB Output is correct
55 Correct 953 ms 66272 KB Output is correct
56 Correct 1102 ms 66400 KB Output is correct
57 Correct 1526 ms 67296 KB Output is correct
58 Correct 908 ms 82664 KB Output is correct
59 Correct 1601 ms 68052 KB Output is correct
60 Correct 18 ms 19072 KB Output is correct
61 Correct 981 ms 67528 KB Output is correct
62 Correct 869 ms 90700 KB Output is correct
63 Correct 958 ms 67436 KB Output is correct
64 Correct 944 ms 67604 KB Output is correct
65 Correct 943 ms 67168 KB Output is correct
66 Correct 936 ms 67520 KB Output is correct
67 Correct 946 ms 67360 KB Output is correct
68 Correct 1103 ms 67776 KB Output is correct
69 Correct 1069 ms 70352 KB Output is correct
70 Correct 972 ms 67588 KB Output is correct
71 Correct 1117 ms 68084 KB Output is correct
72 Correct 1318 ms 68896 KB Output is correct
73 Correct 869 ms 81384 KB Output is correct
74 Correct 1450 ms 70916 KB Output is correct