oj.uz

Submission #378144

# Submission time Handle Problem Language Result Execution time Memory
378144 2021-03-16T05:10:48 Z syl123456 Mergers (JOI19_mergers) C++17
100 / 100
 929 ms 94552 KB 
#include <bits/stdc++.h>
#define all(i) i.begin(), i.end()
#define rall(i) i.rbegin(), i.rend()
using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
const ll mod = 1e9 + 7;
vector<vector<int>> g;
vector<int> rt, low;
vector<bool> vis;
void dfs(int i, int p, int d) {
    vis[i] = true, low[i] = d;
    bool b = false;
    for (int j : g[i]) {
        if (j == p && !b) {
            b = true;
            continue;
        }
        if (!vis[j]) dfs(j, i, d + 1);
        low[i] = min(low[i], low[j]);
    }
    rt[i] = low[i] < d ? p : i;
}
int find(int i) {
    return rt[i] = rt[i] == i ? i : find(rt[i]);
}
int main() {
    ios::sync_with_stdio(0), cin.tie(0);
    int n, k;
    cin >> n >> k;
    g.resize(n), rt.resize(n), low.resize(n), vis.assign(n, false);
    for (int i = 0; i < n - 1; ++i) {
        int x, y;
        cin >> x >> y;
        --x, --y;
        g[x].push_back(y), g[y].push_back(x);
    }
    vector<int> last(k, -1);
    for (int i = 0, x; i < n; ++i) {
        cin >> x, --x;
        if (~last[x])
            g[i].push_back(last[x]), g[last[x]].push_back(i);
        last[x] = i;
    }
    dfs(0, 0, 0);
    for (int i = 0; i < n; ++i) find(i);
    for (int i = 0; i < n; ++i) {
        for (int &j : g[i]) j = rt[j];
        if (rt[i] != i) for (int j : g[i]) g[rt[i]].push_back(j);
    }
    int lf = 0;
    for (int i = 0; i < n; ++i) if (rt[i] == i) {
        sort(all(g[i])), g[i].resize(unique(all(g[i])) - g[i].begin());
        for (int &j : g[i]) if (j == i) {
            swap(j, g[i].back());
            g[i].pop_back();
            break;
        }
        if (g[i].size() == 1)
            ++lf;
    }
    if (lf == 0) return cout << 0, 0;
    cout << (lf + 1 >> 1);
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:63:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   63 |     cout << (lf + 1 >> 1);
      |              ~~~^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory 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

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory 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 3 ms 660 KB Output is correct
27 Correct 3 ms 620 KB Output is correct
28 Correct 2 ms 748 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 3 ms 876 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 2 ms 876 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 2 ms 748 KB Output is correct
35 Correct 2 ms 620 KB Output is correct
36 Correct 3 ms 748 KB Output is correct
37 Correct 3 ms 748 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 3 ms 896 KB Output is correct
40 Correct 3 ms 876 KB Output is correct
41 Correct 3 ms 748 KB Output is correct
42 Correct 2 ms 744 KB Output is correct
43 Correct 3 ms 1004 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 2 ms 748 KB Output is correct
46 Correct 2 ms 620 KB Output is correct
47 Correct 1 ms 364 KB Output is correct
48 Correct 3 ms 748 KB Output is correct
49 Correct 2 ms 620 KB Output is correct
50 Correct 3 ms 620 KB Output is correct
51 Correct 3 ms 620 KB Output is correct
52 Correct 2 ms 748 KB Output is correct
53 Correct 3 ms 748 KB Output is correct
54 Correct 3 ms 876 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory 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 87 ms 10852 KB Output is correct
27 Correct 124 ms 17632 KB Output is correct
28 Correct 3 ms 620 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 150 ms 11756 KB Output is correct
32 Correct 2 ms 748 KB Output is correct
33 Correct 112 ms 19552 KB Output is correct
34 Correct 109 ms 15788 KB Output is correct
35 Correct 3 ms 748 KB Output is correct
36 Correct 103 ms 11372 KB Output is correct
37 Correct 3 ms 876 KB Output is correct
38 Correct 4 ms 748 KB Output is correct
39 Correct 90 ms 10764 KB Output is correct
40 Correct 3 ms 1004 KB Output is correct
41 Correct 123 ms 17376 KB Output is correct
42 Correct 115 ms 19020 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 118 ms 19552 KB Output is correct
45 Correct 119 ms 18528 KB Output is correct
46 Correct 2 ms 748 KB Output is correct
47 Correct 3 ms 876 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 83 ms 10852 KB Output is correct
2 Correct 79 ms 9188 KB Output is correct
3 Correct 3 ms 620 KB Output is correct
4 Correct 3 ms 620 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 2 ms 748 KB Output is correct
8 Correct 102 ms 11244 KB Output is correct
9 Correct 3 ms 748 KB Output is correct
10 Correct 126 ms 11372 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 124 ms 10604 KB Output is correct
13 Correct 134 ms 10688 KB Output is correct
14 Correct 84 ms 8852 KB Output is correct
15 Correct 89 ms 10844 KB Output is correct
16 Correct 2 ms 744 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 97 ms 9952 KB Output is correct
19 Correct 101 ms 13588 KB Output is correct
20 Correct 3 ms 620 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 88 ms 10980 KB Output is correct
23 Correct 3 ms 748 KB Output is correct
24 Correct 138 ms 11628 KB Output is correct
25 Correct 103 ms 12012 KB Output is correct
26 Correct 2 ms 620 KB Output is correct
27 Correct 2 ms 620 KB Output is correct
28 Correct 4 ms 620 KB Output is correct
29 Correct 3 ms 748 KB Output is correct
30 Correct 2 ms 748 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory 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 3 ms 660 KB Output is correct
27 Correct 3 ms 620 KB Output is correct
28 Correct 2 ms 748 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 3 ms 876 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 2 ms 876 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 2 ms 748 KB Output is correct
35 Correct 2 ms 620 KB Output is correct
36 Correct 3 ms 748 KB Output is correct
37 Correct 3 ms 748 KB Output is correct
38 Correct 1 ms 364 KB Output is correct
39 Correct 3 ms 896 KB Output is correct
40 Correct 3 ms 876 KB Output is correct
41 Correct 3 ms 748 KB Output is correct
42 Correct 2 ms 744 KB Output is correct
43 Correct 3 ms 1004 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 2 ms 748 KB Output is correct
46 Correct 2 ms 620 KB Output is correct
47 Correct 1 ms 364 KB Output is correct
48 Correct 3 ms 748 KB Output is correct
49 Correct 2 ms 620 KB Output is correct
50 Correct 3 ms 620 KB Output is correct
51 Correct 3 ms 620 KB Output is correct
52 Correct 2 ms 748 KB Output is correct
53 Correct 3 ms 748 KB Output is correct
54 Correct 3 ms 876 KB Output is correct
55 Correct 1 ms 364 KB Output is correct
56 Correct 87 ms 10852 KB Output is correct
57 Correct 124 ms 17632 KB Output is correct
58 Correct 3 ms 620 KB Output is correct
59 Correct 1 ms 364 KB Output is correct
60 Correct 1 ms 364 KB Output is correct
61 Correct 150 ms 11756 KB Output is correct
62 Correct 2 ms 748 KB Output is correct
63 Correct 112 ms 19552 KB Output is correct
64 Correct 109 ms 15788 KB Output is correct
65 Correct 3 ms 748 KB Output is correct
66 Correct 103 ms 11372 KB Output is correct
67 Correct 3 ms 876 KB Output is correct
68 Correct 4 ms 748 KB Output is correct
69 Correct 90 ms 10764 KB Output is correct
70 Correct 3 ms 1004 KB Output is correct
71 Correct 123 ms 17376 KB Output is correct
72 Correct 115 ms 19020 KB Output is correct
73 Correct 1 ms 364 KB Output is correct
74 Correct 118 ms 19552 KB Output is correct
75 Correct 119 ms 18528 KB Output is correct
76 Correct 2 ms 748 KB Output is correct
77 Correct 3 ms 876 KB Output is correct
78 Correct 83 ms 10852 KB Output is correct
79 Correct 79 ms 9188 KB Output is correct
80 Correct 3 ms 620 KB Output is correct
81 Correct 3 ms 620 KB Output is correct
82 Correct 1 ms 364 KB Output is correct
83 Correct 1 ms 364 KB Output is correct
84 Correct 2 ms 748 KB Output is correct
85 Correct 102 ms 11244 KB Output is correct
86 Correct 3 ms 748 KB Output is correct
87 Correct 126 ms 11372 KB Output is correct
88 Correct 1 ms 364 KB Output is correct
89 Correct 124 ms 10604 KB Output is correct
90 Correct 134 ms 10688 KB Output is correct
91 Correct 84 ms 8852 KB Output is correct
92 Correct 89 ms 10844 KB Output is correct
93 Correct 2 ms 744 KB Output is correct
94 Correct 1 ms 364 KB Output is correct
95 Correct 97 ms 9952 KB Output is correct
96 Correct 101 ms 13588 KB Output is correct
97 Correct 3 ms 620 KB Output is correct
98 Correct 1 ms 364 KB Output is correct
99 Correct 88 ms 10980 KB Output is correct
100 Correct 3 ms 748 KB Output is correct
101 Correct 138 ms 11628 KB Output is correct
102 Correct 103 ms 12012 KB Output is correct
103 Correct 2 ms 620 KB Output is correct
104 Correct 2 ms 620 KB Output is correct
105 Correct 4 ms 620 KB Output is correct
106 Correct 3 ms 748 KB Output is correct
107 Correct 2 ms 748 KB Output is correct
108 Correct 687 ms 52860 KB Output is correct
109 Correct 803 ms 93628 KB Output is correct
110 Correct 815 ms 94552 KB Output is correct
111 Correct 717 ms 72556 KB Output is correct
112 Correct 699 ms 61664 KB Output is correct
113 Correct 546 ms 48592 KB Output is correct
114 Correct 810 ms 77732 KB Output is correct
115 Correct 793 ms 84148 KB Output is correct
116 Correct 929 ms 58540 KB Output is correct
117 Correct 637 ms 44140 KB Output is correct
118 Correct 840 ms 56212 KB Output is correct
119 Correct 642 ms 44240 KB Output is correct
120 Correct 691 ms 61036 KB Output is correct
121 Correct 693 ms 44292 KB Output is correct
122 Correct 865 ms 74176 KB Output is correct
123 Correct 517 ms 45788 KB Output is correct
124 Correct 735 ms 45548 KB Output is correct