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Submission #952092

# Submission time Handle Problem Language Result Execution time Memory
952092 2024-03-23T05:33:32 Z Trisanu_Das Railway (BOI17_railway) C++17
100 / 100
 159 ms 39608 KB 
#include <bits/stdc++.h>
 
using namespace std;
 
const int Nmax = 1e5 + 10;
 
int n, m, k;
unordered_map <int, int> mp[Nmax];
vector <pair <int, int> > e[Nmax];
int s[Nmax];
vector <int> ans;
 
void dfs(int u, int p, int ide) {
    for (auto [v, id]: e[u]) {
        if (v == p) continue;
        dfs(v, u, id);
        if (mp[u].size() < mp[v].size()) mp[u].swap(mp[v]);
        for (auto [i, x]: mp[v]) {
            mp[u][i] += x;
            if (mp[u][i] == s[i]) mp[u].erase(i);
        }
    }
    if (mp[u].size() >= k) ans.push_back(ide);
}
 
int main() {
    ios :: sync_with_stdio(0); cin.tie(0);
    cin >> n >> m >> k;
    for (int i = 1; i < n; ++i) {
        int u, v;
        cin >> u >> v;
        e[u].push_back({v, i});
        e[v].push_back({u, i});
    }
    for (int i = 1; i <= m; ++i) {
        cin >> s[i];
        for (int j = 1; j <= s[i]; ++j) {
            int u;
            cin >> u;
            ++mp[u][i];
        }
    }
    dfs(1, 0, 0);
    cout << ans.size() << '\n';
    sort(ans.begin(), ans.end());
    for (auto id: ans) cout << id << ' ';
}

Compilation message

railway.cpp: In function 'void dfs(int, int, int)':
railway.cpp:23:22: warning: comparison of integer expressions of different signedness: 'std::unordered_map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   23 |     if (mp[u].size() >= k) ans.push_back(ide);
      |         ~~~~~~~~~~~~~^~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8284 KB Output is correct
2 Correct 5 ms 8796 KB Output is correct
3 Correct 5 ms 8796 KB Output is correct
4 Correct 2 ms 8284 KB Output is correct
5 Correct 3 ms 8284 KB Output is correct
6 Correct 6 ms 9764 KB Output is correct
7 Correct 6 ms 9048 KB Output is correct
8 Correct 5 ms 9052 KB Output is correct
9 Correct 5 ms 9052 KB Output is correct
10 Correct 3 ms 8284 KB Output is correct
11 Correct 3 ms 8368 KB Output is correct
12 Correct 3 ms 8284 KB Output is correct
13 Correct 2 ms 8284 KB Output is correct
14 Correct 3 ms 8284 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8284 KB Output is correct
2 Correct 5 ms 8796 KB Output is correct
3 Correct 5 ms 8796 KB Output is correct
4 Correct 2 ms 8284 KB Output is correct
5 Correct 3 ms 8284 KB Output is correct
6 Correct 6 ms 9764 KB Output is correct
7 Correct 6 ms 9048 KB Output is correct
8 Correct 5 ms 9052 KB Output is correct
9 Correct 5 ms 9052 KB Output is correct
10 Correct 3 ms 8284 KB Output is correct
11 Correct 3 ms 8368 KB Output is correct
12 Correct 3 ms 8284 KB Output is correct
13 Correct 2 ms 8284 KB Output is correct
14 Correct 3 ms 8284 KB Output is correct
15 Correct 26 ms 14172 KB Output is correct
16 Correct 25 ms 14416 KB Output is correct
17 Correct 23 ms 14424 KB Output is correct
18 Correct 6 ms 9820 KB Output is correct
19 Correct 5 ms 9304 KB Output is correct
20 Correct 24 ms 13372 KB Output is correct
21 Correct 22 ms 13144 KB Output is correct
22 Correct 3 ms 8280 KB Output is correct
23 Correct 5 ms 8796 KB Output is correct
24 Correct 5 ms 8796 KB Output is correct
25 Correct 3 ms 8284 KB Output is correct
26 Correct 3 ms 8284 KB Output is correct
27 Correct 6 ms 9820 KB Output is correct
28 Correct 5 ms 9052 KB Output is correct
29 Correct 5 ms 9052 KB Output is correct
30 Correct 5 ms 9052 KB Output is correct
31 Correct 2 ms 8284 KB Output is correct
32 Correct 2 ms 8284 KB Output is correct
33 Correct 3 ms 8284 KB Output is correct
34 Correct 3 ms 8476 KB Output is correct
35 Correct 2 ms 8284 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 87 ms 39312 KB Output is correct
2 Correct 3 ms 8284 KB Output is correct
3 Correct 96 ms 39432 KB Output is correct
4 Correct 84 ms 38828 KB Output is correct
5 Correct 82 ms 38636 KB Output is correct
6 Correct 89 ms 38860 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 27896 KB Output is correct
2 Correct 76 ms 23216 KB Output is correct
3 Correct 88 ms 28260 KB Output is correct
4 Correct 101 ms 28516 KB Output is correct
5 Correct 94 ms 28380 KB Output is correct
6 Correct 68 ms 28008 KB Output is correct
7 Correct 69 ms 27988 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 74 ms 27896 KB Output is correct
2 Correct 76 ms 23216 KB Output is correct
3 Correct 88 ms 28260 KB Output is correct
4 Correct 101 ms 28516 KB Output is correct
5 Correct 94 ms 28380 KB Output is correct
6 Correct 68 ms 28008 KB Output is correct
7 Correct 69 ms 27988 KB Output is correct
8 Correct 75 ms 30384 KB Output is correct
9 Correct 76 ms 30380 KB Output is correct
10 Correct 86 ms 37948 KB Output is correct
11 Correct 85 ms 38088 KB Output is correct
12 Correct 57 ms 23884 KB Output is correct
13 Correct 56 ms 23868 KB Output is correct
14 Correct 64 ms 23740 KB Output is correct
15 Correct 89 ms 24264 KB Output is correct
16 Correct 95 ms 29540 KB Output is correct
17 Correct 95 ms 29928 KB Output is correct
18 Correct 87 ms 27652 KB Output is correct
19 Correct 75 ms 23820 KB Output is correct
20 Correct 76 ms 28256 KB Output is correct
21 Correct 73 ms 28412 KB Output is correct
22 Correct 69 ms 28516 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 8284 KB Output is correct
2 Correct 5 ms 8796 KB Output is correct
3 Correct 5 ms 8796 KB Output is correct
4 Correct 2 ms 8284 KB Output is correct
5 Correct 3 ms 8284 KB Output is correct
6 Correct 6 ms 9764 KB Output is correct
7 Correct 6 ms 9048 KB Output is correct
8 Correct 5 ms 9052 KB Output is correct
9 Correct 5 ms 9052 KB Output is correct
10 Correct 3 ms 8284 KB Output is correct
11 Correct 3 ms 8368 KB Output is correct
12 Correct 3 ms 8284 KB Output is correct
13 Correct 2 ms 8284 KB Output is correct
14 Correct 3 ms 8284 KB Output is correct
15 Correct 26 ms 14172 KB Output is correct
16 Correct 25 ms 14416 KB Output is correct
17 Correct 23 ms 14424 KB Output is correct
18 Correct 6 ms 9820 KB Output is correct
19 Correct 5 ms 9304 KB Output is correct
20 Correct 24 ms 13372 KB Output is correct
21 Correct 22 ms 13144 KB Output is correct
22 Correct 3 ms 8280 KB Output is correct
23 Correct 5 ms 8796 KB Output is correct
24 Correct 5 ms 8796 KB Output is correct
25 Correct 3 ms 8284 KB Output is correct
26 Correct 3 ms 8284 KB Output is correct
27 Correct 6 ms 9820 KB Output is correct
28 Correct 5 ms 9052 KB Output is correct
29 Correct 5 ms 9052 KB Output is correct
30 Correct 5 ms 9052 KB Output is correct
31 Correct 2 ms 8284 KB Output is correct
32 Correct 2 ms 8284 KB Output is correct
33 Correct 3 ms 8284 KB Output is correct
34 Correct 3 ms 8476 KB Output is correct
35 Correct 2 ms 8284 KB Output is correct
36 Correct 87 ms 39312 KB Output is correct
37 Correct 3 ms 8284 KB Output is correct
38 Correct 96 ms 39432 KB Output is correct
39 Correct 84 ms 38828 KB Output is correct
40 Correct 82 ms 38636 KB Output is correct
41 Correct 89 ms 38860 KB Output is correct
42 Correct 74 ms 27896 KB Output is correct
43 Correct 76 ms 23216 KB Output is correct
44 Correct 88 ms 28260 KB Output is correct
45 Correct 101 ms 28516 KB Output is correct
46 Correct 94 ms 28380 KB Output is correct
47 Correct 68 ms 28008 KB Output is correct
48 Correct 69 ms 27988 KB Output is correct
49 Correct 75 ms 30384 KB Output is correct
50 Correct 76 ms 30380 KB Output is correct
51 Correct 86 ms 37948 KB Output is correct
52 Correct 85 ms 38088 KB Output is correct
53 Correct 57 ms 23884 KB Output is correct
54 Correct 56 ms 23868 KB Output is correct
55 Correct 64 ms 23740 KB Output is correct
56 Correct 89 ms 24264 KB Output is correct
57 Correct 95 ms 29540 KB Output is correct
58 Correct 95 ms 29928 KB Output is correct
59 Correct 87 ms 27652 KB Output is correct
60 Correct 75 ms 23820 KB Output is correct
61 Correct 76 ms 28256 KB Output is correct
62 Correct 73 ms 28412 KB Output is correct
63 Correct 69 ms 28516 KB Output is correct
64 Correct 73 ms 29616 KB Output is correct
65 Correct 159 ms 38828 KB Output is correct
66 Correct 119 ms 35100 KB Output is correct
67 Correct 97 ms 29776 KB Output is correct
68 Correct 48 ms 20564 KB Output is correct
69 Correct 46 ms 20564 KB Output is correct
70 Correct 83 ms 30612 KB Output is correct
71 Correct 72 ms 30380 KB Output is correct
72 Correct 3 ms 8280 KB Output is correct
73 Correct 5 ms 9052 KB Output is correct
74 Correct 5 ms 9052 KB Output is correct
75 Correct 3 ms 8284 KB Output is correct
76 Correct 3 ms 8284 KB Output is correct
77 Correct 7 ms 9820 KB Output is correct
78 Correct 5 ms 9308 KB Output is correct
79 Correct 5 ms 9308 KB Output is correct
80 Correct 5 ms 9308 KB Output is correct
81 Correct 3 ms 8280 KB Output is correct
82 Correct 3 ms 8284 KB Output is correct
83 Correct 2 ms 8284 KB Output is correct
84 Correct 2 ms 8284 KB Output is correct
85 Correct 2 ms 8504 KB Output is correct
86 Correct 24 ms 14676 KB Output is correct
87 Correct 23 ms 14684 KB Output is correct
88 Correct 26 ms 14684 KB Output is correct
89 Correct 6 ms 9820 KB Output is correct
90 Correct 6 ms 9308 KB Output is correct
91 Correct 24 ms 14160 KB Output is correct
92 Correct 30 ms 13908 KB Output is correct
93 Correct 2 ms 8284 KB Output is correct
94 Correct 89 ms 39608 KB Output is correct
95 Correct 84 ms 39252 KB Output is correct
96 Correct 85 ms 38732 KB Output is correct
97 Correct 86 ms 38636 KB Output is correct
98 Correct 87 ms 38976 KB Output is correct
99 Correct 107 ms 32352 KB Output is correct
100 Correct 98 ms 29456 KB Output is correct
101 Correct 102 ms 29796 KB Output is correct
102 Correct 81 ms 23908 KB Output is correct
103 Correct 68 ms 28000 KB Output is correct
104 Correct 69 ms 28260 KB Output is correct
105 Correct 67 ms 27908 KB Output is correct
106 Correct 77 ms 30640 KB Output is correct
107 Correct 73 ms 30488 KB Output is correct
108 Correct 84 ms 38088 KB Output is correct
109 Correct 82 ms 38012 KB Output is correct
110 Correct 66 ms 23784 KB Output is correct
111 Correct 55 ms 23632 KB Output is correct
112 Correct 66 ms 23680 KB Output is correct
113 Correct 70 ms 23636 KB Output is correct