oj.uz

Submission #552559

# Submission time Handle Problem Language Result Execution time Memory
552559 2022-04-23T09:53:04 Z Vladth11 Railway (BOI17_railway) C++14
100 / 100
 140 ms 26416 KB 
#include <bits/stdc++.h>
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
 
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <long double, pii> muchie;
 
const ll NMAX = 100001;
const ll VMAX = 1001;
const ll INF = (1LL << 60);
const ll MOD = 998244353;
const ll BLOCK = 447;
const ll base = 31;
const ll nr_of_bits = 21;
 
vector <int> sol;
vector <pii> v[NMAX];
int dp[NMAX][nr_of_bits + 1];
int sum[NMAX];
pii timp[NMAX];
int stamp;
 
bool isParent(int a, int b){
    return (timp[a].first <= timp[b].first && timp[b].second <= timp[a].second);
}
 
int LCA(int a, int b){
    int r = a, pas = nr_of_bits;
    while(pas >= 0){
        int nxt = dp[r][pas];
        if(nxt != 0 && !isParent(nxt, b))
            r = nxt;
        pas--;
    }
    if(!isParent(r, b))
        r = dp[r][0];
    return r;
}
 
void DFS(int node, int p){
    dp[node][0] = p;
    timp[node].first = ++stamp;
    for(auto x : v[node]){
        if(x.first == p) continue;
        DFS(x.first, node);
    }
    timp[node].second = stamp;
}
 
int c[NMAX];
 
bool cmp(int a, int b){
    return timp[a].first < timp[b].first;
}
 
int k;
 
void Solve(int node, int p){
    for(auto x : v[node]){
        if(x.first == p) continue;
        Solve(x.first, node);
        sum[node] += sum[x.first];
        if(sum[x.first] >= k){
            sol.push_back(x.second);
        }
    }
}
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int n, m, i;
    cin >> n >> m >> k;
    for(i = 1; i < n; i++){
        int a, b;
        cin >> a >> b;
        v[a].push_back({b, i});
        v[b].push_back({a, i});
    }
    DFS(1, 0);
    for(int j = 1; j <= nr_of_bits; j++){
        for(i = 1; i <= n; i++){
            dp[i][j] = dp[dp[i][j - 1]][j - 1];
        }
    }
    for(i = 1; i <= m; i++){
        int t;
        cin >> t;
        for(int j = 1; j <= t; j++) cin >> c[j];
        vector <int> total, stiva;
      	sort(c + 1, c + t + 1, cmp);
        total.push_back(c[t]);
        for(int j = 1; j < t; j++){
            total.push_back(c[j]);
            total.push_back(LCA(c[j], c[j + 1]));
        }
        sort(total.begin(), total.end(), cmp);
        for(int j = 0; j < total.size(); j++){
            if(j > 0 && timp[total[j - 1]].first == timp[total[j]].first)
                continue;
            while(stiva.size() && timp[stiva.back()].second < timp[total[j]].first)
                stiva.pop_back();
            if(stiva.size()){
                sum[stiva.back()]--;
                sum[total[j]]++;
            }
            stiva.push_back(total[j]);
        }
    }
    Solve(1, 0);
    sort(sol.begin(), sol.end());
    cout << sol.size() << "\n";
    for(auto x : sol) cout << x << " ";
    return 0;
}

Compilation message

railway.cpp: In function 'int main()':
railway.cpp:101:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  101 |         for(int j = 0; j < total.size(); j++){
      |                        ~~^~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 9 ms 3924 KB Output is correct
3 Correct 6 ms 3924 KB Output is correct
4 Correct 2 ms 2680 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 7 ms 4564 KB Output is correct
7 Correct 7 ms 4232 KB Output is correct
8 Correct 6 ms 4096 KB Output is correct
9 Correct 5 ms 4180 KB Output is correct
10 Correct 2 ms 2680 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 2 ms 2676 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 9 ms 3924 KB Output is correct
3 Correct 6 ms 3924 KB Output is correct
4 Correct 2 ms 2680 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 7 ms 4564 KB Output is correct
7 Correct 7 ms 4232 KB Output is correct
8 Correct 6 ms 4096 KB Output is correct
9 Correct 5 ms 4180 KB Output is correct
10 Correct 2 ms 2680 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 2 ms 2676 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 30 ms 4416 KB Output is correct
16 Correct 32 ms 4536 KB Output is correct
17 Correct 32 ms 4556 KB Output is correct
18 Correct 10 ms 4564 KB Output is correct
19 Correct 9 ms 4232 KB Output is correct
20 Correct 28 ms 4612 KB Output is correct
21 Correct 30 ms 4556 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 6 ms 4148 KB Output is correct
24 Correct 6 ms 4108 KB Output is correct
25 Correct 2 ms 2644 KB Output is correct
26 Correct 2 ms 2644 KB Output is correct
27 Correct 7 ms 4564 KB Output is correct
28 Correct 7 ms 4232 KB Output is correct
29 Correct 6 ms 4052 KB Output is correct
30 Correct 7 ms 4108 KB Output is correct
31 Correct 2 ms 2680 KB Output is correct
32 Correct 2 ms 2644 KB Output is correct
33 Correct 2 ms 2644 KB Output is correct
34 Correct 2 ms 2644 KB Output is correct
35 Correct 1 ms 2644 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 91 ms 24252 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 83 ms 23968 KB Output is correct
4 Correct 98 ms 23364 KB Output is correct
5 Correct 134 ms 24292 KB Output is correct
6 Correct 112 ms 24388 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 19928 KB Output is correct
2 Correct 79 ms 16516 KB Output is correct
3 Correct 101 ms 16140 KB Output is correct
4 Correct 101 ms 16188 KB Output is correct
5 Correct 86 ms 16304 KB Output is correct
6 Correct 80 ms 20048 KB Output is correct
7 Correct 77 ms 20028 KB Output is correct

Subtask #5
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 80 ms 19928 KB Output is correct
2 Correct 79 ms 16516 KB Output is correct
3 Correct 101 ms 16140 KB Output is correct
4 Correct 101 ms 16188 KB Output is correct
5 Correct 86 ms 16304 KB Output is correct
6 Correct 80 ms 20048 KB Output is correct
7 Correct 77 ms 20028 KB Output is correct
8 Correct 94 ms 20200 KB Output is correct
9 Correct 100 ms 21952 KB Output is correct
10 Correct 110 ms 26160 KB Output is correct
11 Correct 125 ms 26136 KB Output is correct
12 Correct 70 ms 17688 KB Output is correct
13 Correct 76 ms 17664 KB Output is correct
14 Correct 97 ms 17888 KB Output is correct
15 Correct 117 ms 17856 KB Output is correct
16 Correct 95 ms 17924 KB Output is correct
17 Correct 80 ms 17936 KB Output is correct
18 Correct 85 ms 18080 KB Output is correct
19 Correct 81 ms 18308 KB Output is correct
20 Correct 84 ms 22128 KB Output is correct
21 Correct 108 ms 22216 KB Output is correct
22 Correct 95 ms 22064 KB Output is correct

Subtask #6
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 2644 KB Output is correct
2 Correct 9 ms 3924 KB Output is correct
3 Correct 6 ms 3924 KB Output is correct
4 Correct 2 ms 2680 KB Output is correct
5 Correct 2 ms 2680 KB Output is correct
6 Correct 7 ms 4564 KB Output is correct
7 Correct 7 ms 4232 KB Output is correct
8 Correct 6 ms 4096 KB Output is correct
9 Correct 5 ms 4180 KB Output is correct
10 Correct 2 ms 2680 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 2 ms 2676 KB Output is correct
14 Correct 2 ms 2644 KB Output is correct
15 Correct 30 ms 4416 KB Output is correct
16 Correct 32 ms 4536 KB Output is correct
17 Correct 32 ms 4556 KB Output is correct
18 Correct 10 ms 4564 KB Output is correct
19 Correct 9 ms 4232 KB Output is correct
20 Correct 28 ms 4612 KB Output is correct
21 Correct 30 ms 4556 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 6 ms 4148 KB Output is correct
24 Correct 6 ms 4108 KB Output is correct
25 Correct 2 ms 2644 KB Output is correct
26 Correct 2 ms 2644 KB Output is correct
27 Correct 7 ms 4564 KB Output is correct
28 Correct 7 ms 4232 KB Output is correct
29 Correct 6 ms 4052 KB Output is correct
30 Correct 7 ms 4108 KB Output is correct
31 Correct 2 ms 2680 KB Output is correct
32 Correct 2 ms 2644 KB Output is correct
33 Correct 2 ms 2644 KB Output is correct
34 Correct 2 ms 2644 KB Output is correct
35 Correct 1 ms 2644 KB Output is correct
36 Correct 91 ms 24252 KB Output is correct
37 Correct 2 ms 2644 KB Output is correct
38 Correct 83 ms 23968 KB Output is correct
39 Correct 98 ms 23364 KB Output is correct
40 Correct 134 ms 24292 KB Output is correct
41 Correct 112 ms 24388 KB Output is correct
42 Correct 80 ms 19928 KB Output is correct
43 Correct 79 ms 16516 KB Output is correct
44 Correct 101 ms 16140 KB Output is correct
45 Correct 101 ms 16188 KB Output is correct
46 Correct 86 ms 16304 KB Output is correct
47 Correct 80 ms 20048 KB Output is correct
48 Correct 77 ms 20028 KB Output is correct
49 Correct 94 ms 20200 KB Output is correct
50 Correct 100 ms 21952 KB Output is correct
51 Correct 110 ms 26160 KB Output is correct
52 Correct 125 ms 26136 KB Output is correct
53 Correct 70 ms 17688 KB Output is correct
54 Correct 76 ms 17664 KB Output is correct
55 Correct 97 ms 17888 KB Output is correct
56 Correct 117 ms 17856 KB Output is correct
57 Correct 95 ms 17924 KB Output is correct
58 Correct 80 ms 17936 KB Output is correct
59 Correct 85 ms 18080 KB Output is correct
60 Correct 81 ms 18308 KB Output is correct
61 Correct 84 ms 22128 KB Output is correct
62 Correct 108 ms 22216 KB Output is correct
63 Correct 95 ms 22064 KB Output is correct
64 Correct 85 ms 22016 KB Output is correct
65 Correct 92 ms 17900 KB Output is correct
66 Correct 131 ms 17820 KB Output is correct
67 Correct 102 ms 17772 KB Output is correct
68 Correct 68 ms 17656 KB Output is correct
69 Correct 64 ms 17588 KB Output is correct
70 Correct 83 ms 22336 KB Output is correct
71 Correct 110 ms 21724 KB Output is correct
72 Correct 2 ms 2644 KB Output is correct
73 Correct 8 ms 4108 KB Output is correct
74 Correct 8 ms 4180 KB Output is correct
75 Correct 2 ms 2644 KB Output is correct
76 Correct 2 ms 2680 KB Output is correct
77 Correct 7 ms 4564 KB Output is correct
78 Correct 7 ms 4244 KB Output is correct
79 Correct 6 ms 4052 KB Output is correct
80 Correct 5 ms 4100 KB Output is correct
81 Correct 2 ms 2644 KB Output is correct
82 Correct 2 ms 2644 KB Output is correct
83 Correct 2 ms 2644 KB Output is correct
84 Correct 2 ms 2644 KB Output is correct
85 Correct 2 ms 2644 KB Output is correct
86 Correct 28 ms 4504 KB Output is correct
87 Correct 28 ms 4480 KB Output is correct
88 Correct 30 ms 4484 KB Output is correct
89 Correct 7 ms 4564 KB Output is correct
90 Correct 6 ms 4180 KB Output is correct
91 Correct 32 ms 4576 KB Output is correct
92 Correct 29 ms 4692 KB Output is correct
93 Correct 2 ms 2644 KB Output is correct
94 Correct 105 ms 26096 KB Output is correct
95 Correct 140 ms 25744 KB Output is correct
96 Correct 80 ms 25216 KB Output is correct
97 Correct 97 ms 25992 KB Output is correct
98 Correct 110 ms 26416 KB Output is correct
99 Correct 119 ms 17940 KB Output is correct
100 Correct 114 ms 17868 KB Output is correct
101 Correct 89 ms 17960 KB Output is correct
102 Correct 86 ms 18252 KB Output is correct
103 Correct 91 ms 21836 KB Output is correct
104 Correct 100 ms 22124 KB Output is correct
105 Correct 86 ms 21804 KB Output is correct
106 Correct 96 ms 22164 KB Output is correct
107 Correct 104 ms 21848 KB Output is correct
108 Correct 111 ms 26112 KB Output is correct
109 Correct 103 ms 26116 KB Output is correct
110 Correct 75 ms 17656 KB Output is correct
111 Correct 77 ms 17700 KB Output is correct
112 Correct 87 ms 17824 KB Output is correct
113 Correct 105 ms 17828 KB Output is correct