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답안 #128922

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
128922 2019-07-11T10:57:48 Z win11905 Mergers (JOI19_mergers) C++11
100 / 100
 887 ms 91068 KB 
#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:36:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 1; j < col[i].size(); ++j) {
                        ~~^~~~~~~~~~~~~~~
mergers.cpp:24:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:26:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &u, &v);
         ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:31:14: 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 25 ms 25852 KB Output is correct
2 Correct 25 ms 25848 KB Output is correct
3 Correct 25 ms 25720 KB Output is correct
4 Correct 25 ms 25848 KB Output is correct
5 Correct 25 ms 25720 KB Output is correct
6 Correct 25 ms 25848 KB Output is correct
7 Correct 25 ms 25848 KB Output is correct
8 Correct 25 ms 25848 KB Output is correct
9 Correct 25 ms 25852 KB Output is correct
10 Correct 25 ms 25720 KB Output is correct
11 Correct 25 ms 25848 KB Output is correct
12 Correct 25 ms 25848 KB Output is correct
13 Correct 31 ms 25860 KB Output is correct
14 Correct 25 ms 25848 KB Output is correct
15 Correct 25 ms 25720 KB Output is correct
16 Correct 27 ms 25852 KB Output is correct
17 Correct 29 ms 25848 KB Output is correct
18 Correct 26 ms 25720 KB Output is correct
19 Correct 31 ms 25848 KB Output is correct
20 Correct 25 ms 25848 KB Output is correct
21 Correct 31 ms 25808 KB Output is correct
22 Correct 26 ms 25720 KB Output is correct
23 Correct 25 ms 25848 KB Output is correct
24 Correct 25 ms 25848 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 25852 KB Output is correct
2 Correct 25 ms 25848 KB Output is correct
3 Correct 25 ms 25720 KB Output is correct
4 Correct 25 ms 25848 KB Output is correct
5 Correct 25 ms 25720 KB Output is correct
6 Correct 25 ms 25848 KB Output is correct
7 Correct 25 ms 25848 KB Output is correct
8 Correct 25 ms 25848 KB Output is correct
9 Correct 25 ms 25852 KB Output is correct
10 Correct 25 ms 25720 KB Output is correct
11 Correct 25 ms 25848 KB Output is correct
12 Correct 25 ms 25848 KB Output is correct
13 Correct 31 ms 25860 KB Output is correct
14 Correct 25 ms 25848 KB Output is correct
15 Correct 25 ms 25720 KB Output is correct
16 Correct 27 ms 25852 KB Output is correct
17 Correct 29 ms 25848 KB Output is correct
18 Correct 26 ms 25720 KB Output is correct
19 Correct 31 ms 25848 KB Output is correct
20 Correct 25 ms 25848 KB Output is correct
21 Correct 31 ms 25808 KB Output is correct
22 Correct 26 ms 25720 KB Output is correct
23 Correct 25 ms 25848 KB Output is correct
24 Correct 25 ms 25848 KB Output is correct
25 Correct 24 ms 25720 KB Output is correct
26 Correct 27 ms 26020 KB Output is correct
27 Correct 26 ms 25976 KB Output is correct
28 Correct 27 ms 26076 KB Output is correct
29 Correct 27 ms 25976 KB Output is correct
30 Correct 27 ms 25976 KB Output is correct
31 Correct 25 ms 25848 KB Output is correct
32 Correct 27 ms 26104 KB Output is correct
33 Correct 25 ms 25848 KB Output is correct
34 Correct 26 ms 25976 KB Output is correct
35 Correct 27 ms 25976 KB Output is correct
36 Correct 27 ms 26104 KB Output is correct
37 Correct 27 ms 25980 KB Output is correct
38 Correct 25 ms 25848 KB Output is correct
39 Correct 27 ms 25976 KB Output is correct
40 Correct 27 ms 25976 KB Output is correct
41 Correct 27 ms 25976 KB Output is correct
42 Correct 27 ms 25976 KB Output is correct
43 Correct 27 ms 26104 KB Output is correct
44 Correct 25 ms 25720 KB Output is correct
45 Correct 27 ms 25976 KB Output is correct
46 Correct 27 ms 25976 KB Output is correct
47 Correct 25 ms 25980 KB Output is correct
48 Correct 29 ms 26104 KB Output is correct
49 Correct 27 ms 25976 KB Output is correct
50 Correct 30 ms 26104 KB Output is correct
51 Correct 28 ms 25976 KB Output is correct
52 Correct 27 ms 25976 KB Output is correct
53 Correct 26 ms 25976 KB Output is correct
54 Correct 27 ms 25976 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 25852 KB Output is correct
2 Correct 25 ms 25848 KB Output is correct
3 Correct 25 ms 25720 KB Output is correct
4 Correct 25 ms 25848 KB Output is correct
5 Correct 25 ms 25720 KB Output is correct
6 Correct 25 ms 25848 KB Output is correct
7 Correct 25 ms 25848 KB Output is correct
8 Correct 25 ms 25848 KB Output is correct
9 Correct 25 ms 25852 KB Output is correct
10 Correct 25 ms 25720 KB Output is correct
11 Correct 25 ms 25848 KB Output is correct
12 Correct 25 ms 25848 KB Output is correct
13 Correct 31 ms 25860 KB Output is correct
14 Correct 25 ms 25848 KB Output is correct
15 Correct 25 ms 25720 KB Output is correct
16 Correct 27 ms 25852 KB Output is correct
17 Correct 29 ms 25848 KB Output is correct
18 Correct 26 ms 25720 KB Output is correct
19 Correct 31 ms 25848 KB Output is correct
20 Correct 25 ms 25848 KB Output is correct
21 Correct 31 ms 25808 KB Output is correct
22 Correct 26 ms 25720 KB Output is correct
23 Correct 25 ms 25848 KB Output is correct
24 Correct 25 ms 25848 KB Output is correct
25 Correct 25 ms 25720 KB Output is correct
26 Correct 95 ms 31364 KB Output is correct
27 Correct 120 ms 31152 KB Output is correct
28 Correct 32 ms 25976 KB Output is correct
29 Correct 28 ms 25720 KB Output is correct
30 Correct 30 ms 25720 KB Output is correct
31 Correct 136 ms 31204 KB Output is correct
32 Correct 26 ms 25976 KB Output is correct
33 Correct 135 ms 35448 KB Output is correct
34 Correct 114 ms 31160 KB Output is correct
35 Correct 27 ms 25976 KB Output is correct
36 Correct 130 ms 31596 KB Output is correct
37 Correct 26 ms 25976 KB Output is correct
38 Correct 26 ms 25976 KB Output is correct
39 Correct 93 ms 31340 KB Output is correct
40 Correct 26 ms 26104 KB Output is correct
41 Correct 109 ms 31468 KB Output is correct
42 Correct 123 ms 32492 KB Output is correct
43 Correct 24 ms 25720 KB Output is correct
44 Correct 131 ms 35948 KB Output is correct
45 Correct 124 ms 33256 KB Output is correct
46 Correct 26 ms 25976 KB Output is correct
47 Correct 26 ms 25976 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 95 ms 31456 KB Output is correct
2 Correct 109 ms 34436 KB Output is correct
3 Correct 27 ms 25976 KB Output is correct
4 Correct 27 ms 25976 KB Output is correct
5 Correct 25 ms 25820 KB Output is correct
6 Correct 24 ms 25768 KB Output is correct
7 Correct 27 ms 25992 KB Output is correct
8 Correct 146 ms 32572 KB Output is correct
9 Correct 27 ms 25976 KB Output is correct
10 Correct 122 ms 31536 KB Output is correct
11 Correct 25 ms 25840 KB Output is correct
12 Correct 134 ms 31512 KB Output is correct
13 Correct 144 ms 32432 KB Output is correct
14 Correct 143 ms 34112 KB Output is correct
15 Correct 100 ms 31436 KB Output is correct
16 Correct 27 ms 25976 KB Output is correct
17 Correct 24 ms 25720 KB Output is correct
18 Correct 127 ms 34024 KB Output is correct
19 Correct 143 ms 36432 KB Output is correct
20 Correct 27 ms 25956 KB Output is correct
21 Correct 24 ms 25720 KB Output is correct
22 Correct 112 ms 34524 KB Output is correct
23 Correct 27 ms 25976 KB Output is correct
24 Correct 135 ms 33356 KB Output is correct
25 Correct 147 ms 37340 KB Output is correct
26 Correct 27 ms 26212 KB Output is correct
27 Correct 27 ms 26084 KB Output is correct
28 Correct 27 ms 25964 KB Output is correct
29 Correct 26 ms 25964 KB Output is correct
30 Correct 27 ms 26076 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 25 ms 25852 KB Output is correct
2 Correct 25 ms 25848 KB Output is correct
3 Correct 25 ms 25720 KB Output is correct
4 Correct 25 ms 25848 KB Output is correct
5 Correct 25 ms 25720 KB Output is correct
6 Correct 25 ms 25848 KB Output is correct
7 Correct 25 ms 25848 KB Output is correct
8 Correct 25 ms 25848 KB Output is correct
9 Correct 25 ms 25852 KB Output is correct
10 Correct 25 ms 25720 KB Output is correct
11 Correct 25 ms 25848 KB Output is correct
12 Correct 25 ms 25848 KB Output is correct
13 Correct 31 ms 25860 KB Output is correct
14 Correct 25 ms 25848 KB Output is correct
15 Correct 25 ms 25720 KB Output is correct
16 Correct 27 ms 25852 KB Output is correct
17 Correct 29 ms 25848 KB Output is correct
18 Correct 26 ms 25720 KB Output is correct
19 Correct 31 ms 25848 KB Output is correct
20 Correct 25 ms 25848 KB Output is correct
21 Correct 31 ms 25808 KB Output is correct
22 Correct 26 ms 25720 KB Output is correct
23 Correct 25 ms 25848 KB Output is correct
24 Correct 25 ms 25848 KB Output is correct
25 Correct 24 ms 25720 KB Output is correct
26 Correct 27 ms 26020 KB Output is correct
27 Correct 26 ms 25976 KB Output is correct
28 Correct 27 ms 26076 KB Output is correct
29 Correct 27 ms 25976 KB Output is correct
30 Correct 27 ms 25976 KB Output is correct
31 Correct 25 ms 25848 KB Output is correct
32 Correct 27 ms 26104 KB Output is correct
33 Correct 25 ms 25848 KB Output is correct
34 Correct 26 ms 25976 KB Output is correct
35 Correct 27 ms 25976 KB Output is correct
36 Correct 27 ms 26104 KB Output is correct
37 Correct 27 ms 25980 KB Output is correct
38 Correct 25 ms 25848 KB Output is correct
39 Correct 27 ms 25976 KB Output is correct
40 Correct 27 ms 25976 KB Output is correct
41 Correct 27 ms 25976 KB Output is correct
42 Correct 27 ms 25976 KB Output is correct
43 Correct 27 ms 26104 KB Output is correct
44 Correct 25 ms 25720 KB Output is correct
45 Correct 27 ms 25976 KB Output is correct
46 Correct 27 ms 25976 KB Output is correct
47 Correct 25 ms 25980 KB Output is correct
48 Correct 29 ms 26104 KB Output is correct
49 Correct 27 ms 25976 KB Output is correct
50 Correct 30 ms 26104 KB Output is correct
51 Correct 28 ms 25976 KB Output is correct
52 Correct 27 ms 25976 KB Output is correct
53 Correct 26 ms 25976 KB Output is correct
54 Correct 27 ms 25976 KB Output is correct
55 Correct 25 ms 25720 KB Output is correct
56 Correct 95 ms 31364 KB Output is correct
57 Correct 120 ms 31152 KB Output is correct
58 Correct 32 ms 25976 KB Output is correct
59 Correct 28 ms 25720 KB Output is correct
60 Correct 30 ms 25720 KB Output is correct
61 Correct 136 ms 31204 KB Output is correct
62 Correct 26 ms 25976 KB Output is correct
63 Correct 135 ms 35448 KB Output is correct
64 Correct 114 ms 31160 KB Output is correct
65 Correct 27 ms 25976 KB Output is correct
66 Correct 130 ms 31596 KB Output is correct
67 Correct 26 ms 25976 KB Output is correct
68 Correct 26 ms 25976 KB Output is correct
69 Correct 93 ms 31340 KB Output is correct
70 Correct 26 ms 26104 KB Output is correct
71 Correct 109 ms 31468 KB Output is correct
72 Correct 123 ms 32492 KB Output is correct
73 Correct 24 ms 25720 KB Output is correct
74 Correct 131 ms 35948 KB Output is correct
75 Correct 124 ms 33256 KB Output is correct
76 Correct 26 ms 25976 KB Output is correct
77 Correct 26 ms 25976 KB Output is correct
78 Correct 95 ms 31456 KB Output is correct
79 Correct 109 ms 34436 KB Output is correct
80 Correct 27 ms 25976 KB Output is correct
81 Correct 27 ms 25976 KB Output is correct
82 Correct 25 ms 25820 KB Output is correct
83 Correct 24 ms 25768 KB Output is correct
84 Correct 27 ms 25992 KB Output is correct
85 Correct 146 ms 32572 KB Output is correct
86 Correct 27 ms 25976 KB Output is correct
87 Correct 122 ms 31536 KB Output is correct
88 Correct 25 ms 25840 KB Output is correct
89 Correct 134 ms 31512 KB Output is correct
90 Correct 144 ms 32432 KB Output is correct
91 Correct 143 ms 34112 KB Output is correct
92 Correct 100 ms 31436 KB Output is correct
93 Correct 27 ms 25976 KB Output is correct
94 Correct 24 ms 25720 KB Output is correct
95 Correct 127 ms 34024 KB Output is correct
96 Correct 143 ms 36432 KB Output is correct
97 Correct 27 ms 25956 KB Output is correct
98 Correct 24 ms 25720 KB Output is correct
99 Correct 112 ms 34524 KB Output is correct
100 Correct 27 ms 25976 KB Output is correct
101 Correct 135 ms 33356 KB Output is correct
102 Correct 147 ms 37340 KB Output is correct
103 Correct 27 ms 26212 KB Output is correct
104 Correct 27 ms 26084 KB Output is correct
105 Correct 27 ms 25964 KB Output is correct
106 Correct 26 ms 25964 KB Output is correct
107 Correct 27 ms 26076 KB Output is correct
108 Correct 629 ms 69580 KB Output is correct
109 Correct 735 ms 71696 KB Output is correct
110 Correct 752 ms 78752 KB Output is correct
111 Correct 850 ms 91068 KB Output is correct
112 Correct 887 ms 85152 KB Output is correct
113 Correct 698 ms 77312 KB Output is correct
114 Correct 634 ms 60792 KB Output is correct
115 Correct 611 ms 61356 KB Output is correct
116 Correct 782 ms 65828 KB Output is correct
117 Correct 776 ms 77304 KB Output is correct
118 Correct 690 ms 62268 KB Output is correct
119 Correct 793 ms 77364 KB Output is correct
120 Correct 818 ms 85500 KB Output is correct
121 Correct 800 ms 77296 KB Output is correct
122 Correct 833 ms 71064 KB Output is correct
123 Correct 586 ms 78832 KB Output is correct
124 Correct 836 ms 76080 KB Output is correct