oj.uz

Submission #651313

# Submission time Handle Problem Language Result Execution time Memory
651313 2022-10-18T08:59:48 Z dooompy Railway (BOI17_railway) C++17
100 / 100
 138 ms 28436 KB 
#include "bits/stdc++.h"

using namespace std;

void abc() {cout << endl;}
template <typename T, typename ...U> void abc(T a, U ...b) {
    cout << a << ' ', abc(b...);
}
template <typename T> void printv(T l, T r) {
    while (l != r) cout << *l << " \n"[++l == r];
}
template <typename A, typename B> istream& operator >> (istream& o, pair<A, B> &a) {
    return o >> a.first >> a.second;
}
template <typename A, typename B> ostream& operator << (ostream& o, pair<A, B> a) {
    return o << '(' << a.first << ", " << a.second << ')';
}
template <typename T> ostream& operator << (ostream& o, vector<T> a) {
    bool is = false;
    for (T i : a) {o << (is ? ' ' : '{'), is = true, o << i;}
    return o << '}';
}

#ifdef local
#define test(args...) abc("[" + string(#args) + "]", args)
#else
#define test(args...) void(0)
#endif

using ll = long long;

vector<int> adj[100005];
vector<int> person[50005];

int st[100005];
int timer = 1;
int h[100005];
int jmp[100005][20];

void dfs(int node, int par = -1) {
    st[node] = timer++;

    for (int j = 1; j < 20; j++) {
        jmp[node][j] = jmp[jmp[node][j-1]][j-1];
    }

    for (auto nxt : adj[node]) {
        if (nxt == par) continue;
        h[nxt] = h[node] + 1;
        jmp[nxt][0] = node;
        dfs(nxt, node);
    }
}

int lca(int a, int b) {
    if (h[a] > h[b]) swap(a, b);

    for (int j = 19; j >= 0; j--) {
        if (h[jmp[b][j]] >= h[a]) b = jmp[b][j];
    }

    if (a == b) return a;

    for (int j = 19; j >= 0; j--) {
        if (jmp[a][j] != jmp[b][j]) {
            a = jmp[a][j]; b = jmp[b][j];
        }
    }

    return jmp[a][0];
}


int node[100005];
int val[100005];

int dfs2(int cur, int par) {

    val[cur] = node[cur];
    for (auto nxt : adj[cur]) {
        if (nxt == par) continue;

        val[cur] += dfs2(nxt, cur);
    }

    return val[cur];
}

vector<pair<int, int>> edges;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
//    freopen("", "r", stdin);
//    freopen("", "w", stdout);
    int n, m, k; cin >> n >> m >> k;
    for (int i = 0; i < n - 1; i++) {
        int a, b; cin >> a >> b; adj[a].push_back(b); adj[b].push_back(a); edges.emplace_back(a, b);
    }

    h[1] = 1;
    jmp[1][0] = 1;
    dfs(1);

    for (int i = 0; i < m; i++) {
        int s ;cin >> s;
        vector<int> temp;

        for (int j = 0; j < s; j++) {
            int t; cin >> t; temp.push_back(t);
        }

        sort(temp.begin(), temp.end(), [](int a, int b) {
            return st[a] < st[b];
        });

        for (int j = 0; j < s; j++) {
            int a = temp[j], b = temp[(j + 1) % s];

            int l = lca(a, b);

            node[a]++; node[b]++; node[l] -= 2;
        }
    }

    vector<int> ans;

    dfs2(1, -1);

    int i = 1;
    for (auto edge :edges) {
        int a = (h[edge.first] > h[edge.second] ? edge.first : edge.second);

        if (val[a] >= 2 * k) ans.push_back(i);
        i++;
    }

    cout << ans.size() << endl;
    for (auto a : ans) cout << a << " ";
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3796 KB Output is correct
2 Correct 8 ms 5264 KB Output is correct
3 Correct 10 ms 5332 KB Output is correct
4 Correct 3 ms 3796 KB Output is correct
5 Correct 4 ms 3852 KB Output is correct
6 Correct 8 ms 5716 KB Output is correct
7 Correct 8 ms 5396 KB Output is correct
8 Correct 7 ms 5332 KB Output is correct
9 Correct 7 ms 5332 KB Output is correct
10 Correct 3 ms 3852 KB Output is correct
11 Correct 3 ms 3796 KB Output is correct
12 Correct 3 ms 3796 KB Output is correct
13 Correct 3 ms 3924 KB Output is correct
14 Correct 3 ms 3796 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3796 KB Output is correct
2 Correct 8 ms 5264 KB Output is correct
3 Correct 10 ms 5332 KB Output is correct
4 Correct 3 ms 3796 KB Output is correct
5 Correct 4 ms 3852 KB Output is correct
6 Correct 8 ms 5716 KB Output is correct
7 Correct 8 ms 5396 KB Output is correct
8 Correct 7 ms 5332 KB Output is correct
9 Correct 7 ms 5332 KB Output is correct
10 Correct 3 ms 3852 KB Output is correct
11 Correct 3 ms 3796 KB Output is correct
12 Correct 3 ms 3796 KB Output is correct
13 Correct 3 ms 3924 KB Output is correct
14 Correct 3 ms 3796 KB Output is correct
15 Correct 33 ms 5580 KB Output is correct
16 Correct 30 ms 5684 KB Output is correct
17 Correct 32 ms 5764 KB Output is correct
18 Correct 9 ms 5716 KB Output is correct
19 Correct 8 ms 5404 KB Output is correct
20 Correct 34 ms 5872 KB Output is correct
21 Correct 36 ms 5716 KB Output is correct
22 Correct 3 ms 3796 KB Output is correct
23 Correct 10 ms 5272 KB Output is correct
24 Correct 9 ms 5332 KB Output is correct
25 Correct 3 ms 3796 KB Output is correct
26 Correct 3 ms 3796 KB Output is correct
27 Correct 9 ms 5780 KB Output is correct
28 Correct 9 ms 5400 KB Output is correct
29 Correct 7 ms 5268 KB Output is correct
30 Correct 9 ms 5272 KB Output is correct
31 Correct 3 ms 3796 KB Output is correct
32 Correct 3 ms 3796 KB Output is correct
33 Correct 3 ms 3796 KB Output is correct
34 Correct 2 ms 3796 KB Output is correct
35 Correct 2 ms 3852 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 138 ms 28100 KB Output is correct
2 Correct 2 ms 3796 KB Output is correct
3 Correct 125 ms 27416 KB Output is correct
4 Correct 111 ms 26708 KB Output is correct
5 Correct 137 ms 27968 KB Output is correct
6 Correct 100 ms 28352 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 22720 KB Output is correct
2 Correct 115 ms 19392 KB Output is correct
3 Correct 114 ms 18944 KB Output is correct
4 Correct 135 ms 19028 KB Output is correct
5 Correct 125 ms 19028 KB Output is correct
6 Correct 110 ms 22912 KB Output is correct
7 Correct 104 ms 22672 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 22720 KB Output is correct
2 Correct 115 ms 19392 KB Output is correct
3 Correct 114 ms 18944 KB Output is correct
4 Correct 135 ms 19028 KB Output is correct
5 Correct 125 ms 19028 KB Output is correct
6 Correct 110 ms 22912 KB Output is correct
7 Correct 104 ms 22672 KB Output is correct
8 Correct 108 ms 22940 KB Output is correct
9 Correct 110 ms 22988 KB Output is correct
10 Correct 117 ms 28152 KB Output is correct
11 Correct 119 ms 28032 KB Output is correct
12 Correct 99 ms 18872 KB Output is correct
13 Correct 94 ms 18880 KB Output is correct
14 Correct 112 ms 18960 KB Output is correct
15 Correct 116 ms 18976 KB Output is correct
16 Correct 126 ms 19100 KB Output is correct
17 Correct 132 ms 19032 KB Output is correct
18 Correct 109 ms 19000 KB Output is correct
19 Correct 124 ms 19352 KB Output is correct
20 Correct 107 ms 23008 KB Output is correct
21 Correct 109 ms 23260 KB Output is correct
22 Correct 92 ms 23100 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 3796 KB Output is correct
2 Correct 8 ms 5264 KB Output is correct
3 Correct 10 ms 5332 KB Output is correct
4 Correct 3 ms 3796 KB Output is correct
5 Correct 4 ms 3852 KB Output is correct
6 Correct 8 ms 5716 KB Output is correct
7 Correct 8 ms 5396 KB Output is correct
8 Correct 7 ms 5332 KB Output is correct
9 Correct 7 ms 5332 KB Output is correct
10 Correct 3 ms 3852 KB Output is correct
11 Correct 3 ms 3796 KB Output is correct
12 Correct 3 ms 3796 KB Output is correct
13 Correct 3 ms 3924 KB Output is correct
14 Correct 3 ms 3796 KB Output is correct
15 Correct 33 ms 5580 KB Output is correct
16 Correct 30 ms 5684 KB Output is correct
17 Correct 32 ms 5764 KB Output is correct
18 Correct 9 ms 5716 KB Output is correct
19 Correct 8 ms 5404 KB Output is correct
20 Correct 34 ms 5872 KB Output is correct
21 Correct 36 ms 5716 KB Output is correct
22 Correct 3 ms 3796 KB Output is correct
23 Correct 10 ms 5272 KB Output is correct
24 Correct 9 ms 5332 KB Output is correct
25 Correct 3 ms 3796 KB Output is correct
26 Correct 3 ms 3796 KB Output is correct
27 Correct 9 ms 5780 KB Output is correct
28 Correct 9 ms 5400 KB Output is correct
29 Correct 7 ms 5268 KB Output is correct
30 Correct 9 ms 5272 KB Output is correct
31 Correct 3 ms 3796 KB Output is correct
32 Correct 3 ms 3796 KB Output is correct
33 Correct 3 ms 3796 KB Output is correct
34 Correct 2 ms 3796 KB Output is correct
35 Correct 2 ms 3852 KB Output is correct
36 Correct 138 ms 28100 KB Output is correct
37 Correct 2 ms 3796 KB Output is correct
38 Correct 125 ms 27416 KB Output is correct
39 Correct 111 ms 26708 KB Output is correct
40 Correct 137 ms 27968 KB Output is correct
41 Correct 100 ms 28352 KB Output is correct
42 Correct 103 ms 22720 KB Output is correct
43 Correct 115 ms 19392 KB Output is correct
44 Correct 114 ms 18944 KB Output is correct
45 Correct 135 ms 19028 KB Output is correct
46 Correct 125 ms 19028 KB Output is correct
47 Correct 110 ms 22912 KB Output is correct
48 Correct 104 ms 22672 KB Output is correct
49 Correct 108 ms 22940 KB Output is correct
50 Correct 110 ms 22988 KB Output is correct
51 Correct 117 ms 28152 KB Output is correct
52 Correct 119 ms 28032 KB Output is correct
53 Correct 99 ms 18872 KB Output is correct
54 Correct 94 ms 18880 KB Output is correct
55 Correct 112 ms 18960 KB Output is correct
56 Correct 116 ms 18976 KB Output is correct
57 Correct 126 ms 19100 KB Output is correct
58 Correct 132 ms 19032 KB Output is correct
59 Correct 109 ms 19000 KB Output is correct
60 Correct 124 ms 19352 KB Output is correct
61 Correct 107 ms 23008 KB Output is correct
62 Correct 109 ms 23260 KB Output is correct
63 Correct 92 ms 23100 KB Output is correct
64 Correct 104 ms 23144 KB Output is correct
65 Correct 132 ms 19032 KB Output is correct
66 Correct 132 ms 18968 KB Output is correct
67 Correct 124 ms 18876 KB Output is correct
68 Correct 81 ms 18780 KB Output is correct
69 Correct 78 ms 18840 KB Output is correct
70 Correct 110 ms 23620 KB Output is correct
71 Correct 112 ms 22856 KB Output is correct
72 Correct 2 ms 3852 KB Output is correct
73 Correct 9 ms 5276 KB Output is correct
74 Correct 8 ms 5256 KB Output is correct
75 Correct 4 ms 3852 KB Output is correct
76 Correct 3 ms 3796 KB Output is correct
77 Correct 8 ms 5716 KB Output is correct
78 Correct 8 ms 5332 KB Output is correct
79 Correct 8 ms 5332 KB Output is correct
80 Correct 7 ms 5332 KB Output is correct
81 Correct 3 ms 3796 KB Output is correct
82 Correct 3 ms 3796 KB Output is correct
83 Correct 3 ms 3796 KB Output is correct
84 Correct 3 ms 3796 KB Output is correct
85 Correct 3 ms 3796 KB Output is correct
86 Correct 30 ms 5588 KB Output is correct
87 Correct 31 ms 5692 KB Output is correct
88 Correct 31 ms 5764 KB Output is correct
89 Correct 9 ms 5696 KB Output is correct
90 Correct 7 ms 5404 KB Output is correct
91 Correct 35 ms 5792 KB Output is correct
92 Correct 36 ms 5760 KB Output is correct
93 Correct 2 ms 3796 KB Output is correct
94 Correct 114 ms 28036 KB Output is correct
95 Correct 109 ms 27492 KB Output is correct
96 Correct 111 ms 26684 KB Output is correct
97 Correct 117 ms 28024 KB Output is correct
98 Correct 105 ms 28436 KB Output is correct
99 Correct 121 ms 19008 KB Output is correct
100 Correct 116 ms 18980 KB Output is correct
101 Correct 102 ms 18956 KB Output is correct
102 Correct 114 ms 19544 KB Output is correct
103 Correct 86 ms 22800 KB Output is correct
104 Correct 98 ms 23312 KB Output is correct
105 Correct 88 ms 22676 KB Output is correct
106 Correct 104 ms 23224 KB Output is correct
107 Correct 107 ms 23076 KB Output is correct
108 Correct 101 ms 28100 KB Output is correct
109 Correct 98 ms 28160 KB Output is correct
110 Correct 87 ms 18860 KB Output is correct
111 Correct 81 ms 18884 KB Output is correct
112 Correct 114 ms 18912 KB Output is correct
113 Correct 107 ms 18932 KB Output is correct