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답안 #263172

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
263172 2020-08-13T13:49:14 Z keko37 Mergers (JOI19_mergers) C++14
100 / 100
 1273 ms 127928 KB 
#include<bits/stdc++.h>

using namespace std;

const int MAXN = 500005;
const int LOG = 19;

int n, k, cnt;
int s[MAXN], par[MAXN][LOG], dub[MAXN], e[MAXN], ima[MAXN], bio[MAXN], deg[MAXN];
vector <int> v[MAXN], comp[MAXN];

void dfs (int x, int rod) {
    par[x][0] = rod;
    dub[x] = 1 + dub[rod];
    for (auto sus : v[x]) {
        if (sus == rod) continue;
        dfs(sus, x);
    }
}

void precompute () {
    dfs(1, 0);
    for (int i = 1; i < LOG; i++) {
        for (int j = 1; j <= n; j++) {
            par[j][i] = par[par[j][i - 1]][i - 1];
        }
    }
}

int digni (int x, int len) {
    int pot = 0;
    while (len > 0) {
        if (len & 1) x = par[x][pot];
        len /= 2;
        pot++;
    }
    return x;
}

int lca (int a, int b) {
    if (dub[a] < dub[b]) swap(a, b);
    a = digni(a, dub[a] - dub[b]);
    if (a == b) return a;
    for (int i = LOG - 1; i >= 0; i--) {
        if (par[a][i] != par[b][i]) {
            a = par[a][i];
            b = par[b][i];
        }
    }
    return par[a][0];
}

void obradi (int c) {
    int piv = comp[c][0];
    for (auto x : comp[c]) {
        if (x == piv) continue;
        int g = lca(piv, x);
        e[piv]++; e[x]++;
        e[g] -= 2;
    }
}

void nadi (int x, int rod) {
    for (auto sus : v[x]) {
        if (sus == rod) continue;
        nadi(sus, x);
        e[x] += e[sus];
    }
    if (rod != 0 && e[x] > 0) ima[x] = 1;
}

void oboji (int x) {
    if (bio[x]) return;
    bio[x] = cnt;
    for (auto sus : v[x]) {
        if (par[x][0] == sus && ima[x] || par[x][0] != sus && ima[sus]) oboji(sus);
    }
}

void build () {
    for (int i = 1; i <= n; i++) {
        if (bio[i] == 0) {
            cnt++;
            oboji(i);
        }
    }
}

int solve () {
    if (cnt == 1) return 0;
    for (int i = 2; i <= n; i++) {
        if (ima[i] == 0) {
            deg[bio[i]]++;
            deg[bio[par[i][0]]]++;
        }
    }
    int sol = 0;
    for (int i = 1; i <= cnt; i++) {
        if (deg[i] == 1) sol++;
    }
    return (sol + 1) / 2;
}

int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> k;
    for (int i = 0; i < n-1; i++) {
        int a, b;
        cin >> a >> b;
        v[a].push_back(b);
        v[b].push_back(a);
    }
    for (int i = 1; i <= n; i++) {
        cin >> s[i];
        comp[s[i]].push_back(i);
    }
    precompute();
    for (int i = 1; i <= k; i++) obradi(i);
    nadi(1, 0);
    build();
    cout << solve();
    return 0;
}

Compilation message

mergers.cpp: In function 'void oboji(int)':
mergers.cpp:76:30: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   76 |         if (par[x][0] == sus && ima[x] || par[x][0] != sus && ima[sus]) oboji(sus);
      |             ~~~~~~~~~~~~~~~~~^~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23912 KB Output is correct
2 Correct 20 ms 23936 KB Output is correct
3 Correct 17 ms 23936 KB Output is correct
4 Correct 20 ms 23808 KB Output is correct
5 Correct 17 ms 23808 KB Output is correct
6 Correct 20 ms 23912 KB Output is correct
7 Correct 20 ms 23808 KB Output is correct
8 Correct 20 ms 23936 KB Output is correct
9 Correct 17 ms 23936 KB Output is correct
10 Correct 16 ms 23808 KB Output is correct
11 Correct 17 ms 23936 KB Output is correct
12 Correct 16 ms 23936 KB Output is correct
13 Correct 20 ms 23936 KB Output is correct
14 Correct 17 ms 23936 KB Output is correct
15 Correct 17 ms 23936 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 16 ms 23808 KB Output is correct
18 Correct 21 ms 23936 KB Output is correct
19 Correct 21 ms 23808 KB Output is correct
20 Correct 20 ms 23808 KB Output is correct
21 Correct 18 ms 23936 KB Output is correct
22 Correct 17 ms 23936 KB Output is correct
23 Correct 16 ms 23808 KB Output is correct
24 Correct 17 ms 23936 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23912 KB Output is correct
2 Correct 20 ms 23936 KB Output is correct
3 Correct 17 ms 23936 KB Output is correct
4 Correct 20 ms 23808 KB Output is correct
5 Correct 17 ms 23808 KB Output is correct
6 Correct 20 ms 23912 KB Output is correct
7 Correct 20 ms 23808 KB Output is correct
8 Correct 20 ms 23936 KB Output is correct
9 Correct 17 ms 23936 KB Output is correct
10 Correct 16 ms 23808 KB Output is correct
11 Correct 17 ms 23936 KB Output is correct
12 Correct 16 ms 23936 KB Output is correct
13 Correct 20 ms 23936 KB Output is correct
14 Correct 17 ms 23936 KB Output is correct
15 Correct 17 ms 23936 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 16 ms 23808 KB Output is correct
18 Correct 21 ms 23936 KB Output is correct
19 Correct 21 ms 23808 KB Output is correct
20 Correct 20 ms 23808 KB Output is correct
21 Correct 18 ms 23936 KB Output is correct
22 Correct 17 ms 23936 KB Output is correct
23 Correct 16 ms 23808 KB Output is correct
24 Correct 17 ms 23936 KB Output is correct
25 Correct 16 ms 23936 KB Output is correct
26 Correct 19 ms 24320 KB Output is correct
27 Correct 22 ms 24320 KB Output is correct
28 Correct 22 ms 24448 KB Output is correct
29 Correct 18 ms 24448 KB Output is correct
30 Correct 18 ms 24320 KB Output is correct
31 Correct 16 ms 23936 KB Output is correct
32 Correct 19 ms 24576 KB Output is correct
33 Correct 16 ms 23936 KB Output is correct
34 Correct 22 ms 24320 KB Output is correct
35 Correct 22 ms 24404 KB Output is correct
36 Correct 22 ms 24320 KB Output is correct
37 Correct 19 ms 24320 KB Output is correct
38 Correct 16 ms 23936 KB Output is correct
39 Correct 19 ms 24320 KB Output is correct
40 Correct 22 ms 24320 KB Output is correct
41 Correct 23 ms 24320 KB Output is correct
42 Correct 18 ms 24320 KB Output is correct
43 Correct 19 ms 24448 KB Output is correct
44 Correct 17 ms 23936 KB Output is correct
45 Correct 19 ms 24448 KB Output is correct
46 Correct 22 ms 24320 KB Output is correct
47 Correct 17 ms 23936 KB Output is correct
48 Correct 22 ms 24320 KB Output is correct
49 Correct 18 ms 24320 KB Output is correct
50 Correct 20 ms 24448 KB Output is correct
51 Correct 22 ms 24312 KB Output is correct
52 Correct 18 ms 24320 KB Output is correct
53 Correct 22 ms 24320 KB Output is correct
54 Correct 19 ms 24320 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23912 KB Output is correct
2 Correct 20 ms 23936 KB Output is correct
3 Correct 17 ms 23936 KB Output is correct
4 Correct 20 ms 23808 KB Output is correct
5 Correct 17 ms 23808 KB Output is correct
6 Correct 20 ms 23912 KB Output is correct
7 Correct 20 ms 23808 KB Output is correct
8 Correct 20 ms 23936 KB Output is correct
9 Correct 17 ms 23936 KB Output is correct
10 Correct 16 ms 23808 KB Output is correct
11 Correct 17 ms 23936 KB Output is correct
12 Correct 16 ms 23936 KB Output is correct
13 Correct 20 ms 23936 KB Output is correct
14 Correct 17 ms 23936 KB Output is correct
15 Correct 17 ms 23936 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 16 ms 23808 KB Output is correct
18 Correct 21 ms 23936 KB Output is correct
19 Correct 21 ms 23808 KB Output is correct
20 Correct 20 ms 23808 KB Output is correct
21 Correct 18 ms 23936 KB Output is correct
22 Correct 17 ms 23936 KB Output is correct
23 Correct 16 ms 23808 KB Output is correct
24 Correct 17 ms 23936 KB Output is correct
25 Correct 18 ms 24064 KB Output is correct
26 Correct 107 ms 38764 KB Output is correct
27 Correct 127 ms 38392 KB Output is correct
28 Correct 18 ms 24320 KB Output is correct
29 Correct 18 ms 23936 KB Output is correct
30 Correct 17 ms 23936 KB Output is correct
31 Correct 130 ms 38392 KB Output is correct
32 Correct 18 ms 24320 KB Output is correct
33 Correct 184 ms 44152 KB Output is correct
34 Correct 146 ms 38520 KB Output is correct
35 Correct 19 ms 24320 KB Output is correct
36 Correct 159 ms 38904 KB Output is correct
37 Correct 18 ms 24320 KB Output is correct
38 Correct 21 ms 24320 KB Output is correct
39 Correct 103 ms 38792 KB Output is correct
40 Correct 18 ms 24448 KB Output is correct
41 Correct 131 ms 38388 KB Output is correct
42 Correct 215 ms 40312 KB Output is correct
43 Correct 17 ms 23936 KB Output is correct
44 Correct 173 ms 44272 KB Output is correct
45 Correct 149 ms 41336 KB Output is correct
46 Correct 21 ms 24296 KB Output is correct
47 Correct 18 ms 24320 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 93 ms 38764 KB Output is correct
2 Correct 96 ms 41328 KB Output is correct
3 Correct 18 ms 24320 KB Output is correct
4 Correct 19 ms 24320 KB Output is correct
5 Correct 16 ms 23936 KB Output is correct
6 Correct 16 ms 23936 KB Output is correct
7 Correct 18 ms 24320 KB Output is correct
8 Correct 146 ms 39800 KB Output is correct
9 Correct 20 ms 24320 KB Output is correct
10 Correct 128 ms 38648 KB Output is correct
11 Correct 16 ms 23936 KB Output is correct
12 Correct 138 ms 38520 KB Output is correct
13 Correct 138 ms 39800 KB Output is correct
14 Correct 126 ms 41336 KB Output is correct
15 Correct 100 ms 38640 KB Output is correct
16 Correct 18 ms 24312 KB Output is correct
17 Correct 16 ms 23936 KB Output is correct
18 Correct 114 ms 41840 KB Output is correct
19 Correct 183 ms 44408 KB Output is correct
20 Correct 18 ms 24312 KB Output is correct
21 Correct 20 ms 23936 KB Output is correct
22 Correct 124 ms 40048 KB Output is correct
23 Correct 19 ms 24320 KB Output is correct
24 Correct 151 ms 39032 KB Output is correct
25 Correct 160 ms 43424 KB Output is correct
26 Correct 22 ms 24448 KB Output is correct
27 Correct 19 ms 24440 KB Output is correct
28 Correct 19 ms 24320 KB Output is correct
29 Correct 18 ms 24320 KB Output is correct
30 Correct 20 ms 24320 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 23912 KB Output is correct
2 Correct 20 ms 23936 KB Output is correct
3 Correct 17 ms 23936 KB Output is correct
4 Correct 20 ms 23808 KB Output is correct
5 Correct 17 ms 23808 KB Output is correct
6 Correct 20 ms 23912 KB Output is correct
7 Correct 20 ms 23808 KB Output is correct
8 Correct 20 ms 23936 KB Output is correct
9 Correct 17 ms 23936 KB Output is correct
10 Correct 16 ms 23808 KB Output is correct
11 Correct 17 ms 23936 KB Output is correct
12 Correct 16 ms 23936 KB Output is correct
13 Correct 20 ms 23936 KB Output is correct
14 Correct 17 ms 23936 KB Output is correct
15 Correct 17 ms 23936 KB Output is correct
16 Correct 17 ms 23808 KB Output is correct
17 Correct 16 ms 23808 KB Output is correct
18 Correct 21 ms 23936 KB Output is correct
19 Correct 21 ms 23808 KB Output is correct
20 Correct 20 ms 23808 KB Output is correct
21 Correct 18 ms 23936 KB Output is correct
22 Correct 17 ms 23936 KB Output is correct
23 Correct 16 ms 23808 KB Output is correct
24 Correct 17 ms 23936 KB Output is correct
25 Correct 16 ms 23936 KB Output is correct
26 Correct 19 ms 24320 KB Output is correct
27 Correct 22 ms 24320 KB Output is correct
28 Correct 22 ms 24448 KB Output is correct
29 Correct 18 ms 24448 KB Output is correct
30 Correct 18 ms 24320 KB Output is correct
31 Correct 16 ms 23936 KB Output is correct
32 Correct 19 ms 24576 KB Output is correct
33 Correct 16 ms 23936 KB Output is correct
34 Correct 22 ms 24320 KB Output is correct
35 Correct 22 ms 24404 KB Output is correct
36 Correct 22 ms 24320 KB Output is correct
37 Correct 19 ms 24320 KB Output is correct
38 Correct 16 ms 23936 KB Output is correct
39 Correct 19 ms 24320 KB Output is correct
40 Correct 22 ms 24320 KB Output is correct
41 Correct 23 ms 24320 KB Output is correct
42 Correct 18 ms 24320 KB Output is correct
43 Correct 19 ms 24448 KB Output is correct
44 Correct 17 ms 23936 KB Output is correct
45 Correct 19 ms 24448 KB Output is correct
46 Correct 22 ms 24320 KB Output is correct
47 Correct 17 ms 23936 KB Output is correct
48 Correct 22 ms 24320 KB Output is correct
49 Correct 18 ms 24320 KB Output is correct
50 Correct 20 ms 24448 KB Output is correct
51 Correct 22 ms 24312 KB Output is correct
52 Correct 18 ms 24320 KB Output is correct
53 Correct 22 ms 24320 KB Output is correct
54 Correct 19 ms 24320 KB Output is correct
55 Correct 18 ms 24064 KB Output is correct
56 Correct 107 ms 38764 KB Output is correct
57 Correct 127 ms 38392 KB Output is correct
58 Correct 18 ms 24320 KB Output is correct
59 Correct 18 ms 23936 KB Output is correct
60 Correct 17 ms 23936 KB Output is correct
61 Correct 130 ms 38392 KB Output is correct
62 Correct 18 ms 24320 KB Output is correct
63 Correct 184 ms 44152 KB Output is correct
64 Correct 146 ms 38520 KB Output is correct
65 Correct 19 ms 24320 KB Output is correct
66 Correct 159 ms 38904 KB Output is correct
67 Correct 18 ms 24320 KB Output is correct
68 Correct 21 ms 24320 KB Output is correct
69 Correct 103 ms 38792 KB Output is correct
70 Correct 18 ms 24448 KB Output is correct
71 Correct 131 ms 38388 KB Output is correct
72 Correct 215 ms 40312 KB Output is correct
73 Correct 17 ms 23936 KB Output is correct
74 Correct 173 ms 44272 KB Output is correct
75 Correct 149 ms 41336 KB Output is correct
76 Correct 21 ms 24296 KB Output is correct
77 Correct 18 ms 24320 KB Output is correct
78 Correct 93 ms 38764 KB Output is correct
79 Correct 96 ms 41328 KB Output is correct
80 Correct 18 ms 24320 KB Output is correct
81 Correct 19 ms 24320 KB Output is correct
82 Correct 16 ms 23936 KB Output is correct
83 Correct 16 ms 23936 KB Output is correct
84 Correct 18 ms 24320 KB Output is correct
85 Correct 146 ms 39800 KB Output is correct
86 Correct 20 ms 24320 KB Output is correct
87 Correct 128 ms 38648 KB Output is correct
88 Correct 16 ms 23936 KB Output is correct
89 Correct 138 ms 38520 KB Output is correct
90 Correct 138 ms 39800 KB Output is correct
91 Correct 126 ms 41336 KB Output is correct
92 Correct 100 ms 38640 KB Output is correct
93 Correct 18 ms 24312 KB Output is correct
94 Correct 16 ms 23936 KB Output is correct
95 Correct 114 ms 41840 KB Output is correct
96 Correct 183 ms 44408 KB Output is correct
97 Correct 18 ms 24312 KB Output is correct
98 Correct 20 ms 23936 KB Output is correct
99 Correct 124 ms 40048 KB Output is correct
100 Correct 19 ms 24320 KB Output is correct
101 Correct 151 ms 39032 KB Output is correct
102 Correct 160 ms 43424 KB Output is correct
103 Correct 22 ms 24448 KB Output is correct
104 Correct 19 ms 24440 KB Output is correct
105 Correct 19 ms 24320 KB Output is correct
106 Correct 18 ms 24320 KB Output is correct
107 Correct 20 ms 24320 KB Output is correct
108 Correct 721 ms 100348 KB Output is correct
109 Correct 1273 ms 109288 KB Output is correct
110 Correct 1253 ms 118372 KB Output is correct
111 Correct 1193 ms 127928 KB Output is correct
112 Correct 1098 ms 119496 KB Output is correct
113 Correct 775 ms 109292 KB Output is correct
114 Correct 915 ms 94572 KB Output is correct
115 Correct 928 ms 94436 KB Output is correct
116 Correct 1123 ms 96416 KB Output is correct
117 Correct 881 ms 107432 KB Output is correct
118 Correct 925 ms 94200 KB Output is correct
119 Correct 887 ms 107408 KB Output is correct
120 Correct 1002 ms 118520 KB Output is correct
121 Correct 926 ms 109160 KB Output is correct
122 Correct 1047 ms 101276 KB Output is correct
123 Correct 627 ms 106212 KB Output is correct
124 Correct 1033 ms 106364 KB Output is correct