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답안 #386224

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
386224 2021-04-06T06:50:11 Z nafis_shifat Mergers (JOI19_mergers) C++14
34 / 100
 3000 ms 9572 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int mxn=1e5+5;
const int inf=1e9;
vector<int> v;
vector<int> adj[mxn];
int parent[mxn];
int sz[mxn];
int S[mxn];
vector<int> con[mxn];
int level[mxn];

int findrep(int u) {
    return parent[u] == u ? u : parent[u] = findrep(parent[u]);
}
void unite(int u,int v) {
    u = findrep(u);
    v = findrep(v);
    if(u == v) return;

    if(sz[u] > sz[v]) swap(u,v);
    parent[u] = v;
    sz[v] += sz[u];
}
bool dfs(int cur,int prev,int src) {
    if(cur == src) return true;


    bool f = false;

    for(int u : adj[cur]) {
        if(u == prev) continue;
        f |= dfs(u,cur,src);
    }
    if(f) v.push_back(cur);
    return f;
}

void DFS(int cur,int prev) {
    level[cur] = level[prev] + 1;

    for(int u : adj[cur]) {
        if(u != prev) DFS(u,cur);
    }
}


int main() {
    int n,k;
    cin >> n >> k;

    for(int i = 1; i < n; i++) {
        int u,v;
        cin >> u >> v;

        adj[u].push_back(v);
        adj[v].push_back(u);

    }

    for(int i = 1; i <= n; i++) {
        cin >> S[i];
        con[S[i]].push_back(i);
    }

    for(int i = 1; i <= k; i++) {
        parent[i] = i;
        sz[i] = 1;
    }


    for(int i = 1; i <= k; i++) {
        sort(con[i].begin(),con[i].end(),[](int a,int b) {
            return level[a] < level[b];
        });
        for(int j = 1; j < con[i].size(); j++) {
            v.clear();
            dfs(con[i][j - 1],-1,con[i][j]);
            for(int x : v) {
                unite(i,S[x]);
            }
        }
    }
    int deg[k + 1] = {};

    for(int i = 1; i <= n; i++) {
        int x = findrep(S[i]);
        for(int u : adj[i]) {
            if(x == findrep(S[u])) continue;
            deg[findrep(S[u])]++;
        }
    }

    int leaf = 0;
    for(int i = 1; i <= k; i++) {
        if(parent[i] == i && deg[i] == 1) leaf++;
    }
    cout<<(leaf + 1) / 2<<endl;




}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:78:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |         for(int j = 1; j < con[i].size(); j++) {
      |                        ~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 4 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 5 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 5 ms 4972 KB Output is correct
16 Correct 4 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 4972 KB Output is correct
22 Correct 4 ms 4972 KB Output is correct
23 Correct 4 ms 4972 KB Output is correct
24 Correct 4 ms 4972 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 4 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 5 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 5 ms 4972 KB Output is correct
16 Correct 4 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 4972 KB Output is correct
22 Correct 4 ms 4972 KB Output is correct
23 Correct 4 ms 4972 KB Output is correct
24 Correct 4 ms 4972 KB Output is correct
25 Correct 4 ms 4972 KB Output is correct
26 Correct 34 ms 5228 KB Output is correct
27 Correct 126 ms 5100 KB Output is correct
28 Correct 8 ms 5356 KB Output is correct
29 Correct 9 ms 5356 KB Output is correct
30 Correct 129 ms 5356 KB Output is correct
31 Correct 4 ms 4972 KB Output is correct
32 Correct 8 ms 5484 KB Output is correct
33 Correct 4 ms 5248 KB Output is correct
34 Correct 64 ms 5356 KB Output is correct
35 Correct 8 ms 5356 KB Output is correct
36 Correct 128 ms 5228 KB Output is correct
37 Correct 80 ms 5228 KB Output is correct
38 Correct 4 ms 4972 KB Output is correct
39 Correct 75 ms 5228 KB Output is correct
40 Correct 137 ms 5228 KB Output is correct
41 Correct 136 ms 5228 KB Output is correct
42 Correct 34 ms 5228 KB Output is correct
43 Correct 149 ms 5356 KB Output is correct
44 Correct 4 ms 5100 KB Output is correct
45 Correct 11 ms 5356 KB Output is correct
46 Correct 70 ms 5292 KB Output is correct
47 Correct 4 ms 4972 KB Output is correct
48 Correct 92 ms 5228 KB Output is correct
49 Correct 8 ms 5356 KB Output is correct
50 Correct 8 ms 5356 KB Output is correct
51 Correct 90 ms 5228 KB Output is correct
52 Correct 59 ms 5228 KB Output is correct
53 Correct 34 ms 5228 KB Output is correct
54 Correct 137 ms 5228 KB Output is correct

Subtask #3
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 4 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 5 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 5 ms 4972 KB Output is correct
16 Correct 4 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 4972 KB Output is correct
22 Correct 4 ms 4972 KB Output is correct
23 Correct 4 ms 4972 KB Output is correct
24 Correct 4 ms 4972 KB Output is correct
25 Correct 4 ms 4972 KB Output is correct
26 Execution timed out 3073 ms 9572 KB Time limit exceeded
27 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 3070 ms 9448 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 4972 KB Output is correct
2 Correct 4 ms 4972 KB Output is correct
3 Correct 4 ms 4972 KB Output is correct
4 Correct 4 ms 4972 KB Output is correct
5 Correct 4 ms 4972 KB Output is correct
6 Correct 4 ms 4992 KB Output is correct
7 Correct 4 ms 4972 KB Output is correct
8 Correct 4 ms 4972 KB Output is correct
9 Correct 4 ms 4972 KB Output is correct
10 Correct 4 ms 4972 KB Output is correct
11 Correct 5 ms 4972 KB Output is correct
12 Correct 4 ms 4972 KB Output is correct
13 Correct 4 ms 4972 KB Output is correct
14 Correct 4 ms 4972 KB Output is correct
15 Correct 5 ms 4972 KB Output is correct
16 Correct 4 ms 4972 KB Output is correct
17 Correct 4 ms 4972 KB Output is correct
18 Correct 4 ms 4972 KB Output is correct
19 Correct 4 ms 4972 KB Output is correct
20 Correct 4 ms 4972 KB Output is correct
21 Correct 4 ms 4972 KB Output is correct
22 Correct 4 ms 4972 KB Output is correct
23 Correct 4 ms 4972 KB Output is correct
24 Correct 4 ms 4972 KB Output is correct
25 Correct 4 ms 4972 KB Output is correct
26 Correct 34 ms 5228 KB Output is correct
27 Correct 126 ms 5100 KB Output is correct
28 Correct 8 ms 5356 KB Output is correct
29 Correct 9 ms 5356 KB Output is correct
30 Correct 129 ms 5356 KB Output is correct
31 Correct 4 ms 4972 KB Output is correct
32 Correct 8 ms 5484 KB Output is correct
33 Correct 4 ms 5248 KB Output is correct
34 Correct 64 ms 5356 KB Output is correct
35 Correct 8 ms 5356 KB Output is correct
36 Correct 128 ms 5228 KB Output is correct
37 Correct 80 ms 5228 KB Output is correct
38 Correct 4 ms 4972 KB Output is correct
39 Correct 75 ms 5228 KB Output is correct
40 Correct 137 ms 5228 KB Output is correct
41 Correct 136 ms 5228 KB Output is correct
42 Correct 34 ms 5228 KB Output is correct
43 Correct 149 ms 5356 KB Output is correct
44 Correct 4 ms 5100 KB Output is correct
45 Correct 11 ms 5356 KB Output is correct
46 Correct 70 ms 5292 KB Output is correct
47 Correct 4 ms 4972 KB Output is correct
48 Correct 92 ms 5228 KB Output is correct
49 Correct 8 ms 5356 KB Output is correct
50 Correct 8 ms 5356 KB Output is correct
51 Correct 90 ms 5228 KB Output is correct
52 Correct 59 ms 5228 KB Output is correct
53 Correct 34 ms 5228 KB Output is correct
54 Correct 137 ms 5228 KB Output is correct
55 Correct 4 ms 4972 KB Output is correct
56 Execution timed out 3073 ms 9572 KB Time limit exceeded
57 Halted 0 ms 0 KB -