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답안 #210364

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
210364 2020-03-17T07:36:22 Z arman_ferdous Mergers (JOI19_mergers) C++14
100 / 100
 815 ms 85596 KB 
// taken from https://github.com/win11905/submission/blob/master/JOISC/19/mergers.cpp
#include <bits/stdc++.h>
#define pii pair<int, int>
#define x first
#define y second
using namespace std;

const int N = 5e5+5;

int n, k;
vector<int> g[N];
vector<pii> E;
int dep[N], dsu[N], deg[N], par[N];
vector<int> col[N];

int find(int u) { return dsu[u] = dsu[u] == u ? u : find(dsu[u]); }

void init_dep(int u, int p) {
    dep[u] = dep[p] + 1, par[u] = p;
    for(int v : g[u]) if(v != p) init_dep(v, u);
}

int main() {
    iota(dsu, dsu+N, 0);
    scanf("%d %d", &n, &k);
    for(int i = 1, u, v; i < n; ++i) {
        scanf("%d %d", &u, &v);
        g[u].emplace_back(v), g[v].emplace_back(u);
        E.emplace_back(u, v);
    }
    for(int i = 1, v; i <= n; ++i) {
        scanf("%d", &v);
        col[v].emplace_back(i);
    }
    init_dep(1, 0);
    for(int i = 1; i <= k; ++i) if(col[i].size() > 1) {
        for(int j = 1; j < col[i].size(); ++j) {
            int a = find(col[i][j-1]), b = find(col[i][j]);
            while(a != b) {
                if(dep[a] < dep[b]) swap(a, b);
                dsu[a] = find(par[a]);
                a = dsu[a];
            }
        } 
    }
    for(auto x : E) {
        int a = find(x.x), b = find(x.y);
        if(a != b) deg[a]++, deg[b]++;
    }
    int cnt = 0;
    for(int i = 1; i <= n; ++i) if(deg[i] == 1) cnt++;
    printf("%d\n", (cnt+1) / 2);
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:37:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 1; j < col[i].size(); ++j) {
                        ~~^~~~~~~~~~~~~~~
mergers.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:27:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &u, &v);
         ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:32:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &v);
         ~~~~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 25720 KB Output is correct
2 Correct 21 ms 25720 KB Output is correct
3 Correct 22 ms 25720 KB Output is correct
4 Correct 20 ms 25720 KB Output is correct
5 Correct 21 ms 25848 KB Output is correct
6 Correct 21 ms 25720 KB Output is correct
7 Correct 20 ms 25720 KB Output is correct
8 Correct 20 ms 25720 KB Output is correct
9 Correct 21 ms 25720 KB Output is correct
10 Correct 20 ms 25720 KB Output is correct
11 Correct 21 ms 25720 KB Output is correct
12 Correct 20 ms 25720 KB Output is correct
13 Correct 21 ms 25720 KB Output is correct
14 Correct 20 ms 25720 KB Output is correct
15 Correct 20 ms 25820 KB Output is correct
16 Correct 20 ms 25832 KB Output is correct
17 Correct 20 ms 25848 KB Output is correct
18 Correct 20 ms 25720 KB Output is correct
19 Correct 21 ms 25720 KB Output is correct
20 Correct 20 ms 25724 KB Output is correct
21 Correct 21 ms 25720 KB Output is correct
22 Correct 22 ms 25720 KB Output is correct
23 Correct 21 ms 25720 KB Output is correct
24 Correct 20 ms 25720 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 25720 KB Output is correct
2 Correct 21 ms 25720 KB Output is correct
3 Correct 22 ms 25720 KB Output is correct
4 Correct 20 ms 25720 KB Output is correct
5 Correct 21 ms 25848 KB Output is correct
6 Correct 21 ms 25720 KB Output is correct
7 Correct 20 ms 25720 KB Output is correct
8 Correct 20 ms 25720 KB Output is correct
9 Correct 21 ms 25720 KB Output is correct
10 Correct 20 ms 25720 KB Output is correct
11 Correct 21 ms 25720 KB Output is correct
12 Correct 20 ms 25720 KB Output is correct
13 Correct 21 ms 25720 KB Output is correct
14 Correct 20 ms 25720 KB Output is correct
15 Correct 20 ms 25820 KB Output is correct
16 Correct 20 ms 25832 KB Output is correct
17 Correct 20 ms 25848 KB Output is correct
18 Correct 20 ms 25720 KB Output is correct
19 Correct 21 ms 25720 KB Output is correct
20 Correct 20 ms 25724 KB Output is correct
21 Correct 21 ms 25720 KB Output is correct
22 Correct 22 ms 25720 KB Output is correct
23 Correct 21 ms 25720 KB Output is correct
24 Correct 20 ms 25720 KB Output is correct
25 Correct 21 ms 25848 KB Output is correct
26 Correct 22 ms 25976 KB Output is correct
27 Correct 22 ms 25976 KB Output is correct
28 Correct 23 ms 26104 KB Output is correct
29 Correct 23 ms 26104 KB Output is correct
30 Correct 22 ms 25976 KB Output is correct
31 Correct 21 ms 25720 KB Output is correct
32 Correct 23 ms 26104 KB Output is correct
33 Correct 21 ms 25720 KB Output is correct
34 Correct 23 ms 25976 KB Output is correct
35 Correct 24 ms 26104 KB Output is correct
36 Correct 23 ms 25976 KB Output is correct
37 Correct 23 ms 25976 KB Output is correct
38 Correct 21 ms 25720 KB Output is correct
39 Correct 23 ms 25972 KB Output is correct
40 Correct 22 ms 25980 KB Output is correct
41 Correct 22 ms 25976 KB Output is correct
42 Correct 22 ms 25976 KB Output is correct
43 Correct 23 ms 26108 KB Output is correct
44 Correct 20 ms 25720 KB Output is correct
45 Correct 23 ms 26104 KB Output is correct
46 Correct 23 ms 25976 KB Output is correct
47 Correct 21 ms 25720 KB Output is correct
48 Correct 23 ms 25976 KB Output is correct
49 Correct 23 ms 26104 KB Output is correct
50 Correct 22 ms 26104 KB Output is correct
51 Correct 23 ms 25976 KB Output is correct
52 Correct 23 ms 25976 KB Output is correct
53 Correct 22 ms 25976 KB Output is correct
54 Correct 22 ms 25976 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 25720 KB Output is correct
2 Correct 21 ms 25720 KB Output is correct
3 Correct 22 ms 25720 KB Output is correct
4 Correct 20 ms 25720 KB Output is correct
5 Correct 21 ms 25848 KB Output is correct
6 Correct 21 ms 25720 KB Output is correct
7 Correct 20 ms 25720 KB Output is correct
8 Correct 20 ms 25720 KB Output is correct
9 Correct 21 ms 25720 KB Output is correct
10 Correct 20 ms 25720 KB Output is correct
11 Correct 21 ms 25720 KB Output is correct
12 Correct 20 ms 25720 KB Output is correct
13 Correct 21 ms 25720 KB Output is correct
14 Correct 20 ms 25720 KB Output is correct
15 Correct 20 ms 25820 KB Output is correct
16 Correct 20 ms 25832 KB Output is correct
17 Correct 20 ms 25848 KB Output is correct
18 Correct 20 ms 25720 KB Output is correct
19 Correct 21 ms 25720 KB Output is correct
20 Correct 20 ms 25724 KB Output is correct
21 Correct 21 ms 25720 KB Output is correct
22 Correct 22 ms 25720 KB Output is correct
23 Correct 21 ms 25720 KB Output is correct
24 Correct 20 ms 25720 KB Output is correct
25 Correct 21 ms 25720 KB Output is correct
26 Correct 83 ms 32868 KB Output is correct
27 Correct 105 ms 32488 KB Output is correct
28 Correct 23 ms 25976 KB Output is correct
29 Correct 21 ms 25720 KB Output is correct
30 Correct 21 ms 25720 KB Output is correct
31 Correct 104 ms 32616 KB Output is correct
32 Correct 22 ms 25976 KB Output is correct
33 Correct 116 ms 36712 KB Output is correct
34 Correct 106 ms 32488 KB Output is correct
35 Correct 22 ms 25976 KB Output is correct
36 Correct 111 ms 33004 KB Output is correct
37 Correct 23 ms 25976 KB Output is correct
38 Correct 22 ms 25976 KB Output is correct
39 Correct 85 ms 32744 KB Output is correct
40 Correct 23 ms 26104 KB Output is correct
41 Correct 107 ms 32876 KB Output is correct
42 Correct 109 ms 33900 KB Output is correct
43 Correct 20 ms 25720 KB Output is correct
44 Correct 116 ms 37228 KB Output is correct
45 Correct 111 ms 34664 KB Output is correct
46 Correct 22 ms 25976 KB Output is correct
47 Correct 23 ms 25976 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 81 ms 31460 KB Output is correct
2 Correct 96 ms 34404 KB Output is correct
3 Correct 22 ms 25976 KB Output is correct
4 Correct 24 ms 25976 KB Output is correct
5 Correct 20 ms 25720 KB Output is correct
6 Correct 20 ms 25720 KB Output is correct
7 Correct 22 ms 25976 KB Output is correct
8 Correct 122 ms 34284 KB Output is correct
9 Correct 22 ms 25976 KB Output is correct
10 Correct 106 ms 33132 KB Output is correct
11 Correct 21 ms 25720 KB Output is correct
12 Correct 110 ms 33000 KB Output is correct
13 Correct 124 ms 34152 KB Output is correct
14 Correct 116 ms 35820 KB Output is correct
15 Correct 85 ms 32768 KB Output is correct
16 Correct 22 ms 25976 KB Output is correct
17 Correct 21 ms 25720 KB Output is correct
18 Correct 103 ms 35816 KB Output is correct
19 Correct 122 ms 38124 KB Output is correct
20 Correct 23 ms 25976 KB Output is correct
21 Correct 20 ms 25720 KB Output is correct
22 Correct 100 ms 34532 KB Output is correct
23 Correct 23 ms 25976 KB Output is correct
24 Correct 118 ms 33388 KB Output is correct
25 Correct 118 ms 37356 KB Output is correct
26 Correct 23 ms 26104 KB Output is correct
27 Correct 22 ms 26104 KB Output is correct
28 Correct 22 ms 25976 KB Output is correct
29 Correct 22 ms 26048 KB Output is correct
30 Correct 22 ms 25976 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 21 ms 25720 KB Output is correct
2 Correct 21 ms 25720 KB Output is correct
3 Correct 22 ms 25720 KB Output is correct
4 Correct 20 ms 25720 KB Output is correct
5 Correct 21 ms 25848 KB Output is correct
6 Correct 21 ms 25720 KB Output is correct
7 Correct 20 ms 25720 KB Output is correct
8 Correct 20 ms 25720 KB Output is correct
9 Correct 21 ms 25720 KB Output is correct
10 Correct 20 ms 25720 KB Output is correct
11 Correct 21 ms 25720 KB Output is correct
12 Correct 20 ms 25720 KB Output is correct
13 Correct 21 ms 25720 KB Output is correct
14 Correct 20 ms 25720 KB Output is correct
15 Correct 20 ms 25820 KB Output is correct
16 Correct 20 ms 25832 KB Output is correct
17 Correct 20 ms 25848 KB Output is correct
18 Correct 20 ms 25720 KB Output is correct
19 Correct 21 ms 25720 KB Output is correct
20 Correct 20 ms 25724 KB Output is correct
21 Correct 21 ms 25720 KB Output is correct
22 Correct 22 ms 25720 KB Output is correct
23 Correct 21 ms 25720 KB Output is correct
24 Correct 20 ms 25720 KB Output is correct
25 Correct 21 ms 25848 KB Output is correct
26 Correct 22 ms 25976 KB Output is correct
27 Correct 22 ms 25976 KB Output is correct
28 Correct 23 ms 26104 KB Output is correct
29 Correct 23 ms 26104 KB Output is correct
30 Correct 22 ms 25976 KB Output is correct
31 Correct 21 ms 25720 KB Output is correct
32 Correct 23 ms 26104 KB Output is correct
33 Correct 21 ms 25720 KB Output is correct
34 Correct 23 ms 25976 KB Output is correct
35 Correct 24 ms 26104 KB Output is correct
36 Correct 23 ms 25976 KB Output is correct
37 Correct 23 ms 25976 KB Output is correct
38 Correct 21 ms 25720 KB Output is correct
39 Correct 23 ms 25972 KB Output is correct
40 Correct 22 ms 25980 KB Output is correct
41 Correct 22 ms 25976 KB Output is correct
42 Correct 22 ms 25976 KB Output is correct
43 Correct 23 ms 26108 KB Output is correct
44 Correct 20 ms 25720 KB Output is correct
45 Correct 23 ms 26104 KB Output is correct
46 Correct 23 ms 25976 KB Output is correct
47 Correct 21 ms 25720 KB Output is correct
48 Correct 23 ms 25976 KB Output is correct
49 Correct 23 ms 26104 KB Output is correct
50 Correct 22 ms 26104 KB Output is correct
51 Correct 23 ms 25976 KB Output is correct
52 Correct 23 ms 25976 KB Output is correct
53 Correct 22 ms 25976 KB Output is correct
54 Correct 22 ms 25976 KB Output is correct
55 Correct 21 ms 25720 KB Output is correct
56 Correct 83 ms 32868 KB Output is correct
57 Correct 105 ms 32488 KB Output is correct
58 Correct 23 ms 25976 KB Output is correct
59 Correct 21 ms 25720 KB Output is correct
60 Correct 21 ms 25720 KB Output is correct
61 Correct 104 ms 32616 KB Output is correct
62 Correct 22 ms 25976 KB Output is correct
63 Correct 116 ms 36712 KB Output is correct
64 Correct 106 ms 32488 KB Output is correct
65 Correct 22 ms 25976 KB Output is correct
66 Correct 111 ms 33004 KB Output is correct
67 Correct 23 ms 25976 KB Output is correct
68 Correct 22 ms 25976 KB Output is correct
69 Correct 85 ms 32744 KB Output is correct
70 Correct 23 ms 26104 KB Output is correct
71 Correct 107 ms 32876 KB Output is correct
72 Correct 109 ms 33900 KB Output is correct
73 Correct 20 ms 25720 KB Output is correct
74 Correct 116 ms 37228 KB Output is correct
75 Correct 111 ms 34664 KB Output is correct
76 Correct 22 ms 25976 KB Output is correct
77 Correct 23 ms 25976 KB Output is correct
78 Correct 81 ms 31460 KB Output is correct
79 Correct 96 ms 34404 KB Output is correct
80 Correct 22 ms 25976 KB Output is correct
81 Correct 24 ms 25976 KB Output is correct
82 Correct 20 ms 25720 KB Output is correct
83 Correct 20 ms 25720 KB Output is correct
84 Correct 22 ms 25976 KB Output is correct
85 Correct 122 ms 34284 KB Output is correct
86 Correct 22 ms 25976 KB Output is correct
87 Correct 106 ms 33132 KB Output is correct
88 Correct 21 ms 25720 KB Output is correct
89 Correct 110 ms 33000 KB Output is correct
90 Correct 124 ms 34152 KB Output is correct
91 Correct 116 ms 35820 KB Output is correct
92 Correct 85 ms 32768 KB Output is correct
93 Correct 22 ms 25976 KB Output is correct
94 Correct 21 ms 25720 KB Output is correct
95 Correct 103 ms 35816 KB Output is correct
96 Correct 122 ms 38124 KB Output is correct
97 Correct 23 ms 25976 KB Output is correct
98 Correct 20 ms 25720 KB Output is correct
99 Correct 100 ms 34532 KB Output is correct
100 Correct 23 ms 25976 KB Output is correct
101 Correct 118 ms 33388 KB Output is correct
102 Correct 118 ms 37356 KB Output is correct
103 Correct 23 ms 26104 KB Output is correct
104 Correct 22 ms 26104 KB Output is correct
105 Correct 22 ms 25976 KB Output is correct
106 Correct 22 ms 26048 KB Output is correct
107 Correct 22 ms 25976 KB Output is correct
108 Correct 583 ms 64708 KB Output is correct
109 Correct 725 ms 69084 KB Output is correct
110 Correct 731 ms 75740 KB Output is correct
111 Correct 815 ms 85596 KB Output is correct
112 Correct 794 ms 79708 KB Output is correct
113 Correct 646 ms 71900 KB Output is correct
114 Correct 628 ms 57820 KB Output is correct
115 Correct 626 ms 58464 KB Output is correct
116 Correct 759 ms 60644 KB Output is correct
117 Correct 735 ms 71516 KB Output is correct
118 Correct 645 ms 58104 KB Output is correct
119 Correct 753 ms 71516 KB Output is correct
120 Correct 761 ms 79628 KB Output is correct
121 Correct 740 ms 71516 KB Output is correct
122 Correct 788 ms 65244 KB Output is correct
123 Correct 534 ms 72784 KB Output is correct
124 Correct 788 ms 70492 KB Output is correct