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답안 #545547

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
545547 2022-04-04T19:43:15 Z Lobo Mergers (JOI19_mergers) C++17
70 / 100
 948 ms 262144 KB 
#include<bits/stdc++.h>
using namespace std;

const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

const int maxn = 5e5+10;

int n, k, tin[maxn], p[maxn][23], ps[maxn][23], h[maxn], ds[maxn], dsz[maxn];
int timer = 0;
vector<int> g[maxn];
vector<pair<int,int>> vec[maxn];

void dfs(int u, int ant) {
    p[u][0] = ant;
    tin[u] = ++timer;

    for(int i = 1; i <= 20; i++) {
        p[u][i] = p[p[u][i-1]][i-1];
    }
    for(auto v : g[u]) {
        if(v == ant) continue;
        h[v] = h[u]+1;
        dfs(v,u);
    }
}

int lca(int u, int v) {
    if(h[u] < h[v]) swap(u,v);

    for(int i = 20; i >= 0; i--) {
        if(h[p[u][i]] >= h[v]) {
            u = p[u][i];
        }
    }

    if(u == v) return u;

    for(int i = 20; i >= 0; i--) {
        if(p[u][i] != p[v][i]) {
            u = p[u][i];
            v = p[v][i];
        }
    }

    return p[u][0];
}

int find(int v) {
    if(ds[v] == v) return v;
    return ds[v] = find(ds[v]);
}

void join(int u, int v) {
    if(dsz[u] < dsz[v]) swap(u,v);
    ds[v] = u;
    dsz[u]+= dsz[v];
}

int qtdf = 0, mark[maxn];
void dfs1(int u) {
    mark[u] = 1;
    set<int> st;
    for(auto v : g[u]) {
        v = find(v);
        if(v != u) st.insert(v);
        if(mark[v]) continue;
        dfs1(v);
    }
    if(st.size() == 1) qtdf++;
}

void solve() {
    cin >> n >> k;

    for(int i = 1; i <= n-1; i++) {
        int u,v; cin >> u >> v;
        g[u].pb(v);
        g[v].pb(u);
    }

    dfs(1,1);

    for(int i = 1; i <= n; i++) {
        int cl; cin >> cl;
        vec[cl].pb(mp(tin[i],i));
    }

    for(int i = 1; i <= k; i++) {
        sort(all(vec[i]));
        vec[i].pb(vec[i][0]);
        for(int j = 1; j < vec[i].size(); j++) {
            int u = vec[i][j-1].sc;
            int v = vec[i][j].sc;

            int lc = lca(u,v);

            for(int j = 20; j >= 0; j--) {
                if(h[p[u][j]] > h[lc]) {
                    ps[u][j]++;
                    u = p[u][j];
                }
            }
            if(u != lc) {
                ps[u][0]++;
            }

            for(int j = 20; j >= 0; j--) {
                if(h[p[v][j]] > h[lc]) {
                    ps[v][j]++;
                    v = p[v][j];
                }
            }
            if(v != lc) {
                ps[v][0]++;
            }
        }
    }

    for(int j = 20; j >= 1; j--) {
        for(int i = 1; i <= n; i++) {
            ps[i][j-1]+= ps[i][j];
            ps[p[i][j-1]][j-1]+= ps[i][j];
        }
    }

    for(int i = 1; i <= n; i++) {
        ds[i] = i;
        dsz[i] = 1;
    }

    int ans = n-1;
    for(int i = 1; i <= n; i++) {
        if(ps[i][0] != 0) {
            int u = find(i);
            int v = find(p[i][0]);
            if(u != v) {
                ans--;
                join(u,v);
            }
        }
    }

    for(int i = 1; i <= n; i++) {
        int v = find(i);
        if(v == i) continue;
        for(auto x : g[i]) {
            if(x != v) g[v].pb(find(x));
        }
    }

    dfs1(find(1));

    cout << (qtdf+1)/2 << endl;

}

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(0);

    // freopen("in.in", "r", stdin);
    // freopen("out.out", "w", stdout);
    
    int tt = 1;
    // cin >> tt;
    int t = 1;
    while(tt--) {
        solve();
    }

}

Compilation message

mergers.cpp: In function 'void solve()':
mergers.cpp:100:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |         for(int j = 1; j < vec[i].size(); j++) {
      |                        ~~^~~~~~~~~~~~~~~
mergers.cpp: In function 'int32_t main()':
mergers.cpp:174:9: warning: unused variable 't' [-Wunused-variable]
  174 |     int t = 1;
      |         ^

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23820 KB Output is correct
2 Correct 14 ms 23892 KB Output is correct
3 Correct 13 ms 23912 KB Output is correct
4 Correct 12 ms 23820 KB Output is correct
5 Correct 12 ms 23736 KB Output is correct
6 Correct 12 ms 23824 KB Output is correct
7 Correct 12 ms 23784 KB Output is correct
8 Correct 13 ms 23892 KB Output is correct
9 Correct 12 ms 23868 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23908 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 14 ms 23904 KB Output is correct
15 Correct 13 ms 23892 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23764 KB Output is correct
18 Correct 11 ms 23824 KB Output is correct
19 Correct 12 ms 23816 KB Output is correct
20 Correct 11 ms 23824 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 12 ms 23892 KB Output is correct
23 Correct 12 ms 23844 KB Output is correct
24 Correct 12 ms 23892 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23820 KB Output is correct
2 Correct 14 ms 23892 KB Output is correct
3 Correct 13 ms 23912 KB Output is correct
4 Correct 12 ms 23820 KB Output is correct
5 Correct 12 ms 23736 KB Output is correct
6 Correct 12 ms 23824 KB Output is correct
7 Correct 12 ms 23784 KB Output is correct
8 Correct 13 ms 23892 KB Output is correct
9 Correct 12 ms 23868 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23908 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 14 ms 23904 KB Output is correct
15 Correct 13 ms 23892 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23764 KB Output is correct
18 Correct 11 ms 23824 KB Output is correct
19 Correct 12 ms 23816 KB Output is correct
20 Correct 11 ms 23824 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 12 ms 23892 KB Output is correct
23 Correct 12 ms 23844 KB Output is correct
24 Correct 12 ms 23892 KB Output is correct
25 Correct 13 ms 23892 KB Output is correct
26 Correct 16 ms 25396 KB Output is correct
27 Correct 15 ms 25240 KB Output is correct
28 Correct 17 ms 25496 KB Output is correct
29 Correct 16 ms 25360 KB Output is correct
30 Correct 16 ms 25376 KB Output is correct
31 Correct 13 ms 23892 KB Output is correct
32 Correct 16 ms 25500 KB Output is correct
33 Correct 12 ms 23892 KB Output is correct
34 Correct 16 ms 25312 KB Output is correct
35 Correct 16 ms 25372 KB Output is correct
36 Correct 20 ms 25236 KB Output is correct
37 Correct 17 ms 25428 KB Output is correct
38 Correct 13 ms 23916 KB Output is correct
39 Correct 16 ms 25372 KB Output is correct
40 Correct 15 ms 25244 KB Output is correct
41 Correct 16 ms 25372 KB Output is correct
42 Correct 18 ms 25376 KB Output is correct
43 Correct 16 ms 25428 KB Output is correct
44 Correct 12 ms 23824 KB Output is correct
45 Correct 16 ms 25420 KB Output is correct
46 Correct 16 ms 25368 KB Output is correct
47 Correct 13 ms 23892 KB Output is correct
48 Correct 17 ms 25300 KB Output is correct
49 Correct 16 ms 25440 KB Output is correct
50 Correct 16 ms 25556 KB Output is correct
51 Correct 17 ms 25380 KB Output is correct
52 Correct 16 ms 25364 KB Output is correct
53 Correct 16 ms 25392 KB Output is correct
54 Correct 16 ms 25300 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23820 KB Output is correct
2 Correct 14 ms 23892 KB Output is correct
3 Correct 13 ms 23912 KB Output is correct
4 Correct 12 ms 23820 KB Output is correct
5 Correct 12 ms 23736 KB Output is correct
6 Correct 12 ms 23824 KB Output is correct
7 Correct 12 ms 23784 KB Output is correct
8 Correct 13 ms 23892 KB Output is correct
9 Correct 12 ms 23868 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23908 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 14 ms 23904 KB Output is correct
15 Correct 13 ms 23892 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23764 KB Output is correct
18 Correct 11 ms 23824 KB Output is correct
19 Correct 12 ms 23816 KB Output is correct
20 Correct 11 ms 23824 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 12 ms 23892 KB Output is correct
23 Correct 12 ms 23844 KB Output is correct
24 Correct 12 ms 23892 KB Output is correct
25 Correct 12 ms 23824 KB Output is correct
26 Correct 179 ms 71720 KB Output is correct
27 Correct 241 ms 71424 KB Output is correct
28 Correct 17 ms 25300 KB Output is correct
29 Correct 13 ms 23844 KB Output is correct
30 Correct 14 ms 23892 KB Output is correct
31 Correct 208 ms 70752 KB Output is correct
32 Correct 16 ms 25300 KB Output is correct
33 Correct 278 ms 75160 KB Output is correct
34 Correct 211 ms 71040 KB Output is correct
35 Correct 16 ms 25272 KB Output is correct
36 Correct 219 ms 70672 KB Output is correct
37 Correct 15 ms 25248 KB Output is correct
38 Correct 15 ms 25300 KB Output is correct
39 Correct 164 ms 71552 KB Output is correct
40 Correct 19 ms 25372 KB Output is correct
41 Correct 204 ms 71888 KB Output is correct
42 Correct 223 ms 71748 KB Output is correct
43 Correct 14 ms 23820 KB Output is correct
44 Correct 266 ms 75832 KB Output is correct
45 Correct 249 ms 74248 KB Output is correct
46 Correct 17 ms 25400 KB Output is correct
47 Correct 18 ms 25292 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 180 ms 71128 KB Output is correct
2 Correct 211 ms 77860 KB Output is correct
3 Correct 16 ms 25300 KB Output is correct
4 Correct 16 ms 25252 KB Output is correct
5 Correct 16 ms 23820 KB Output is correct
6 Correct 14 ms 23776 KB Output is correct
7 Correct 17 ms 25388 KB Output is correct
8 Correct 231 ms 74132 KB Output is correct
9 Correct 16 ms 25232 KB Output is correct
10 Correct 205 ms 71912 KB Output is correct
11 Correct 16 ms 23892 KB Output is correct
12 Correct 197 ms 71416 KB Output is correct
13 Correct 213 ms 74336 KB Output is correct
14 Correct 256 ms 73600 KB Output is correct
15 Correct 159 ms 71496 KB Output is correct
16 Correct 17 ms 25472 KB Output is correct
17 Correct 13 ms 23824 KB Output is correct
18 Correct 219 ms 78284 KB Output is correct
19 Correct 254 ms 83828 KB Output is correct
20 Correct 16 ms 25300 KB Output is correct
21 Correct 13 ms 23892 KB Output is correct
22 Correct 173 ms 74316 KB Output is correct
23 Correct 18 ms 25428 KB Output is correct
24 Correct 221 ms 73348 KB Output is correct
25 Correct 249 ms 82256 KB Output is correct
26 Correct 20 ms 25428 KB Output is correct
27 Correct 17 ms 25556 KB Output is correct
28 Correct 16 ms 25316 KB Output is correct
29 Correct 18 ms 25320 KB Output is correct
30 Correct 16 ms 25428 KB Output is correct

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 23820 KB Output is correct
2 Correct 14 ms 23892 KB Output is correct
3 Correct 13 ms 23912 KB Output is correct
4 Correct 12 ms 23820 KB Output is correct
5 Correct 12 ms 23736 KB Output is correct
6 Correct 12 ms 23824 KB Output is correct
7 Correct 12 ms 23784 KB Output is correct
8 Correct 13 ms 23892 KB Output is correct
9 Correct 12 ms 23868 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23908 KB Output is correct
12 Correct 11 ms 23892 KB Output is correct
13 Correct 12 ms 23764 KB Output is correct
14 Correct 14 ms 23904 KB Output is correct
15 Correct 13 ms 23892 KB Output is correct
16 Correct 12 ms 23764 KB Output is correct
17 Correct 12 ms 23764 KB Output is correct
18 Correct 11 ms 23824 KB Output is correct
19 Correct 12 ms 23816 KB Output is correct
20 Correct 11 ms 23824 KB Output is correct
21 Correct 12 ms 23892 KB Output is correct
22 Correct 12 ms 23892 KB Output is correct
23 Correct 12 ms 23844 KB Output is correct
24 Correct 12 ms 23892 KB Output is correct
25 Correct 13 ms 23892 KB Output is correct
26 Correct 16 ms 25396 KB Output is correct
27 Correct 15 ms 25240 KB Output is correct
28 Correct 17 ms 25496 KB Output is correct
29 Correct 16 ms 25360 KB Output is correct
30 Correct 16 ms 25376 KB Output is correct
31 Correct 13 ms 23892 KB Output is correct
32 Correct 16 ms 25500 KB Output is correct
33 Correct 12 ms 23892 KB Output is correct
34 Correct 16 ms 25312 KB Output is correct
35 Correct 16 ms 25372 KB Output is correct
36 Correct 20 ms 25236 KB Output is correct
37 Correct 17 ms 25428 KB Output is correct
38 Correct 13 ms 23916 KB Output is correct
39 Correct 16 ms 25372 KB Output is correct
40 Correct 15 ms 25244 KB Output is correct
41 Correct 16 ms 25372 KB Output is correct
42 Correct 18 ms 25376 KB Output is correct
43 Correct 16 ms 25428 KB Output is correct
44 Correct 12 ms 23824 KB Output is correct
45 Correct 16 ms 25420 KB Output is correct
46 Correct 16 ms 25368 KB Output is correct
47 Correct 13 ms 23892 KB Output is correct
48 Correct 17 ms 25300 KB Output is correct
49 Correct 16 ms 25440 KB Output is correct
50 Correct 16 ms 25556 KB Output is correct
51 Correct 17 ms 25380 KB Output is correct
52 Correct 16 ms 25364 KB Output is correct
53 Correct 16 ms 25392 KB Output is correct
54 Correct 16 ms 25300 KB Output is correct
55 Correct 12 ms 23824 KB Output is correct
56 Correct 179 ms 71720 KB Output is correct
57 Correct 241 ms 71424 KB Output is correct
58 Correct 17 ms 25300 KB Output is correct
59 Correct 13 ms 23844 KB Output is correct
60 Correct 14 ms 23892 KB Output is correct
61 Correct 208 ms 70752 KB Output is correct
62 Correct 16 ms 25300 KB Output is correct
63 Correct 278 ms 75160 KB Output is correct
64 Correct 211 ms 71040 KB Output is correct
65 Correct 16 ms 25272 KB Output is correct
66 Correct 219 ms 70672 KB Output is correct
67 Correct 15 ms 25248 KB Output is correct
68 Correct 15 ms 25300 KB Output is correct
69 Correct 164 ms 71552 KB Output is correct
70 Correct 19 ms 25372 KB Output is correct
71 Correct 204 ms 71888 KB Output is correct
72 Correct 223 ms 71748 KB Output is correct
73 Correct 14 ms 23820 KB Output is correct
74 Correct 266 ms 75832 KB Output is correct
75 Correct 249 ms 74248 KB Output is correct
76 Correct 17 ms 25400 KB Output is correct
77 Correct 18 ms 25292 KB Output is correct
78 Correct 180 ms 71128 KB Output is correct
79 Correct 211 ms 77860 KB Output is correct
80 Correct 16 ms 25300 KB Output is correct
81 Correct 16 ms 25252 KB Output is correct
82 Correct 16 ms 23820 KB Output is correct
83 Correct 14 ms 23776 KB Output is correct
84 Correct 17 ms 25388 KB Output is correct
85 Correct 231 ms 74132 KB Output is correct
86 Correct 16 ms 25232 KB Output is correct
87 Correct 205 ms 71912 KB Output is correct
88 Correct 16 ms 23892 KB Output is correct
89 Correct 197 ms 71416 KB Output is correct
90 Correct 213 ms 74336 KB Output is correct
91 Correct 256 ms 73600 KB Output is correct
92 Correct 159 ms 71496 KB Output is correct
93 Correct 17 ms 25472 KB Output is correct
94 Correct 13 ms 23824 KB Output is correct
95 Correct 219 ms 78284 KB Output is correct
96 Correct 254 ms 83828 KB Output is correct
97 Correct 16 ms 25300 KB Output is correct
98 Correct 13 ms 23892 KB Output is correct
99 Correct 173 ms 74316 KB Output is correct
100 Correct 18 ms 25428 KB Output is correct
101 Correct 221 ms 73348 KB Output is correct
102 Correct 249 ms 82256 KB Output is correct
103 Correct 20 ms 25428 KB Output is correct
104 Correct 17 ms 25556 KB Output is correct
105 Correct 16 ms 25316 KB Output is correct
106 Correct 18 ms 25320 KB Output is correct
107 Correct 16 ms 25428 KB Output is correct
108 Runtime error 948 ms 262144 KB Execution killed with signal 9
109 Halted 0 ms 0 KB -