oj.uz

Submission #167281

# Submission time Handle Problem Language Result Execution time Memory
167281 2019-12-07T07:52:45 Z maruii Mergers (JOI19_mergers) C++14
100 / 100
 976 ms 91044 KB 
#include <bits/stdc++.h>
using namespace std;

vector<int> edge[500005], vec[500005];
int dfn[500005], dfnn, C[500005], par[500005], dep[500005], D[500005];
bool A[500005];

struct UF {
	int par[500005];
	UF() { iota(par, par + 500005, 0); }
	int fnd(int x) { return par[x] == x ? x : par[x] = fnd(par[x]); }
} u1;;

void dfs(int x, int p) {
	par[x] = p;
	dep[x] = dep[p] + 1;
	dfn[x] = ++dfnn;
	for (auto i : edge[x]) {
		if (i == p) continue;
		dfs(i, x);
	}
}

int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	int N, M; cin >> N >> M;
	for (int i = 1; i < N; ++i) {
		int x, y; cin >> x >> y;
		edge[x].push_back(y);
		edge[y].push_back(x);
	}
	dfs(1, 1);
	for (int i = 1; i <= N; ++i) {
		cin >> C[i];
		vec[C[i]].push_back(i);
	}
	for (int i = 1; i <= N; ++i) D[i] = edge[i].size();
	for (int i = 1; i <= M; ++i) {
		sort(vec[i].begin(), vec[i].end(), [&](int a, int b) {
			return dfn[a] < dfn[b];
		});
		for (int j = 0; j + 1 < vec[i].size(); ++j) {
			int x = u1.fnd(vec[i][j]), y = u1.fnd(vec[i][j + 1]);
			while (x != y) {
				int a, b;
				if (dep[x] < dep[y]) {
					int t = u1.fnd(par[y]);
					if (y != t) {
						D[y]--;
						D[t]--;
						u1.par[y] = t;
						D[t] += D[y];
					}
					y = t;
				}
				else {
					int t = u1.fnd(par[x]);
					if (x != t) {
						D[x]--;
						D[t]--;
						u1.par[x] = t;
						D[t] += D[x];
					}
					x = t;
				}
			}
		}
	}
	int ans = 1;
	for (int i = 1; i <= N; ++i) {
		int t = u1.fnd(i);
		if (A[t] == 0 && D[t] == 1) A[t] = 1, ans++;
	}
	cout << ans / 2;
	return 0;
}

Compilation message

mergers.cpp: In function 'int main()':
mergers.cpp:42:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j + 1 < vec[i].size(); ++j) {
                   ~~~~~~^~~~~~~~~~~~~~~
mergers.cpp:45:9: warning: unused variable 'a' [-Wunused-variable]
     int a, b;
         ^
mergers.cpp:45:12: warning: unused variable 'b' [-Wunused-variable]
     int a, b;
            ^

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 25848 KB Output is correct
2 Correct 28 ms 25848 KB Output is correct
3 Correct 28 ms 25848 KB Output is correct
4 Correct 31 ms 25848 KB Output is correct
5 Correct 28 ms 25848 KB Output is correct
6 Correct 28 ms 25848 KB Output is correct
7 Correct 28 ms 25848 KB Output is correct
8 Correct 28 ms 25852 KB Output is correct
9 Correct 27 ms 25848 KB Output is correct
10 Correct 29 ms 25848 KB Output is correct
11 Correct 27 ms 25848 KB Output is correct
12 Correct 27 ms 25848 KB Output is correct
13 Correct 27 ms 25976 KB Output is correct
14 Correct 28 ms 25848 KB Output is correct
15 Correct 27 ms 25900 KB Output is correct
16 Correct 27 ms 25848 KB Output is correct
17 Correct 28 ms 25976 KB Output is correct
18 Correct 27 ms 25848 KB Output is correct
19 Correct 27 ms 25848 KB Output is correct
20 Correct 27 ms 25848 KB Output is correct
21 Correct 27 ms 25848 KB Output is correct
22 Correct 28 ms 25848 KB Output is correct
23 Correct 27 ms 25848 KB Output is correct
24 Correct 29 ms 25848 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 25848 KB Output is correct
2 Correct 28 ms 25848 KB Output is correct
3 Correct 28 ms 25848 KB Output is correct
4 Correct 31 ms 25848 KB Output is correct
5 Correct 28 ms 25848 KB Output is correct
6 Correct 28 ms 25848 KB Output is correct
7 Correct 28 ms 25848 KB Output is correct
8 Correct 28 ms 25852 KB Output is correct
9 Correct 27 ms 25848 KB Output is correct
10 Correct 29 ms 25848 KB Output is correct
11 Correct 27 ms 25848 KB Output is correct
12 Correct 27 ms 25848 KB Output is correct
13 Correct 27 ms 25976 KB Output is correct
14 Correct 28 ms 25848 KB Output is correct
15 Correct 27 ms 25900 KB Output is correct
16 Correct 27 ms 25848 KB Output is correct
17 Correct 28 ms 25976 KB Output is correct
18 Correct 27 ms 25848 KB Output is correct
19 Correct 27 ms 25848 KB Output is correct
20 Correct 27 ms 25848 KB Output is correct
21 Correct 27 ms 25848 KB Output is correct
22 Correct 28 ms 25848 KB Output is correct
23 Correct 27 ms 25848 KB Output is correct
24 Correct 29 ms 25848 KB Output is correct
25 Correct 28 ms 25976 KB Output is correct
26 Correct 29 ms 26104 KB Output is correct
27 Correct 30 ms 25976 KB Output is correct
28 Correct 31 ms 26284 KB Output is correct
29 Correct 30 ms 26104 KB Output is correct
30 Correct 43 ms 26088 KB Output is correct
31 Correct 33 ms 25848 KB Output is correct
32 Correct 30 ms 26204 KB Output is correct
33 Correct 27 ms 25848 KB Output is correct
34 Correct 42 ms 26060 KB Output is correct
35 Correct 29 ms 26104 KB Output is correct
36 Correct 29 ms 26104 KB Output is correct
37 Correct 38 ms 26104 KB Output is correct
38 Correct 28 ms 25848 KB Output is correct
39 Correct 30 ms 26360 KB Output is correct
40 Correct 30 ms 26104 KB Output is correct
41 Correct 36 ms 25976 KB Output is correct
42 Correct 29 ms 26104 KB Output is correct
43 Correct 30 ms 26360 KB Output is correct
44 Correct 28 ms 25980 KB Output is correct
45 Correct 30 ms 26068 KB Output is correct
46 Correct 30 ms 26104 KB Output is correct
47 Correct 29 ms 25976 KB Output is correct
48 Correct 29 ms 25976 KB Output is correct
49 Correct 29 ms 26232 KB Output is correct
50 Correct 33 ms 26276 KB Output is correct
51 Correct 30 ms 25976 KB Output is correct
52 Correct 29 ms 26104 KB Output is correct
53 Correct 29 ms 26104 KB Output is correct
54 Correct 30 ms 26104 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 25848 KB Output is correct
2 Correct 28 ms 25848 KB Output is correct
3 Correct 28 ms 25848 KB Output is correct
4 Correct 31 ms 25848 KB Output is correct
5 Correct 28 ms 25848 KB Output is correct
6 Correct 28 ms 25848 KB Output is correct
7 Correct 28 ms 25848 KB Output is correct
8 Correct 28 ms 25852 KB Output is correct
9 Correct 27 ms 25848 KB Output is correct
10 Correct 29 ms 25848 KB Output is correct
11 Correct 27 ms 25848 KB Output is correct
12 Correct 27 ms 25848 KB Output is correct
13 Correct 27 ms 25976 KB Output is correct
14 Correct 28 ms 25848 KB Output is correct
15 Correct 27 ms 25900 KB Output is correct
16 Correct 27 ms 25848 KB Output is correct
17 Correct 28 ms 25976 KB Output is correct
18 Correct 27 ms 25848 KB Output is correct
19 Correct 27 ms 25848 KB Output is correct
20 Correct 27 ms 25848 KB Output is correct
21 Correct 27 ms 25848 KB Output is correct
22 Correct 28 ms 25848 KB Output is correct
23 Correct 27 ms 25848 KB Output is correct
24 Correct 29 ms 25848 KB Output is correct
25 Correct 28 ms 25848 KB Output is correct
26 Correct 100 ms 33336 KB Output is correct
27 Correct 122 ms 33144 KB Output is correct
28 Correct 30 ms 25976 KB Output is correct
29 Correct 28 ms 25868 KB Output is correct
30 Correct 27 ms 25848 KB Output is correct
31 Correct 118 ms 33016 KB Output is correct
32 Correct 29 ms 26032 KB Output is correct
33 Correct 121 ms 37240 KB Output is correct
34 Correct 123 ms 33144 KB Output is correct
35 Correct 29 ms 25976 KB Output is correct
36 Correct 132 ms 33400 KB Output is correct
37 Correct 29 ms 26104 KB Output is correct
38 Correct 30 ms 25976 KB Output is correct
39 Correct 100 ms 33292 KB Output is correct
40 Correct 29 ms 26104 KB Output is correct
41 Correct 115 ms 33000 KB Output is correct
42 Correct 130 ms 34356 KB Output is correct
43 Correct 28 ms 25848 KB Output is correct
44 Correct 142 ms 37388 KB Output is correct
45 Correct 119 ms 35192 KB Output is correct
46 Correct 28 ms 26104 KB Output is correct
47 Correct 30 ms 26104 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 32236 KB Output is correct
2 Correct 111 ms 34888 KB Output is correct
3 Correct 29 ms 26104 KB Output is correct
4 Correct 29 ms 26076 KB Output is correct
5 Correct 27 ms 25848 KB Output is correct
6 Correct 27 ms 25848 KB Output is correct
7 Correct 29 ms 26104 KB Output is correct
8 Correct 130 ms 34424 KB Output is correct
9 Correct 29 ms 25976 KB Output is correct
10 Correct 125 ms 33244 KB Output is correct
11 Correct 27 ms 25848 KB Output is correct
12 Correct 163 ms 33252 KB Output is correct
13 Correct 138 ms 34412 KB Output is correct
14 Correct 132 ms 36056 KB Output is correct
15 Correct 102 ms 33264 KB Output is correct
16 Correct 29 ms 26104 KB Output is correct
17 Correct 27 ms 25848 KB Output is correct
18 Correct 109 ms 36060 KB Output is correct
19 Correct 172 ms 38160 KB Output is correct
20 Correct 29 ms 26108 KB Output is correct
21 Correct 36 ms 25852 KB Output is correct
22 Correct 112 ms 34600 KB Output is correct
23 Correct 34 ms 26068 KB Output is correct
24 Correct 140 ms 33528 KB Output is correct
25 Correct 129 ms 37516 KB Output is correct
26 Correct 29 ms 26076 KB Output is correct
27 Correct 30 ms 26188 KB Output is correct
28 Correct 30 ms 26040 KB Output is correct
29 Correct 35 ms 26108 KB Output is correct
30 Correct 30 ms 26004 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 25848 KB Output is correct
2 Correct 28 ms 25848 KB Output is correct
3 Correct 28 ms 25848 KB Output is correct
4 Correct 31 ms 25848 KB Output is correct
5 Correct 28 ms 25848 KB Output is correct
6 Correct 28 ms 25848 KB Output is correct
7 Correct 28 ms 25848 KB Output is correct
8 Correct 28 ms 25852 KB Output is correct
9 Correct 27 ms 25848 KB Output is correct
10 Correct 29 ms 25848 KB Output is correct
11 Correct 27 ms 25848 KB Output is correct
12 Correct 27 ms 25848 KB Output is correct
13 Correct 27 ms 25976 KB Output is correct
14 Correct 28 ms 25848 KB Output is correct
15 Correct 27 ms 25900 KB Output is correct
16 Correct 27 ms 25848 KB Output is correct
17 Correct 28 ms 25976 KB Output is correct
18 Correct 27 ms 25848 KB Output is correct
19 Correct 27 ms 25848 KB Output is correct
20 Correct 27 ms 25848 KB Output is correct
21 Correct 27 ms 25848 KB Output is correct
22 Correct 28 ms 25848 KB Output is correct
23 Correct 27 ms 25848 KB Output is correct
24 Correct 29 ms 25848 KB Output is correct
25 Correct 28 ms 25976 KB Output is correct
26 Correct 29 ms 26104 KB Output is correct
27 Correct 30 ms 25976 KB Output is correct
28 Correct 31 ms 26284 KB Output is correct
29 Correct 30 ms 26104 KB Output is correct
30 Correct 43 ms 26088 KB Output is correct
31 Correct 33 ms 25848 KB Output is correct
32 Correct 30 ms 26204 KB Output is correct
33 Correct 27 ms 25848 KB Output is correct
34 Correct 42 ms 26060 KB Output is correct
35 Correct 29 ms 26104 KB Output is correct
36 Correct 29 ms 26104 KB Output is correct
37 Correct 38 ms 26104 KB Output is correct
38 Correct 28 ms 25848 KB Output is correct
39 Correct 30 ms 26360 KB Output is correct
40 Correct 30 ms 26104 KB Output is correct
41 Correct 36 ms 25976 KB Output is correct
42 Correct 29 ms 26104 KB Output is correct
43 Correct 30 ms 26360 KB Output is correct
44 Correct 28 ms 25980 KB Output is correct
45 Correct 30 ms 26068 KB Output is correct
46 Correct 30 ms 26104 KB Output is correct
47 Correct 29 ms 25976 KB Output is correct
48 Correct 29 ms 25976 KB Output is correct
49 Correct 29 ms 26232 KB Output is correct
50 Correct 33 ms 26276 KB Output is correct
51 Correct 30 ms 25976 KB Output is correct
52 Correct 29 ms 26104 KB Output is correct
53 Correct 29 ms 26104 KB Output is correct
54 Correct 30 ms 26104 KB Output is correct
55 Correct 28 ms 25848 KB Output is correct
56 Correct 100 ms 33336 KB Output is correct
57 Correct 122 ms 33144 KB Output is correct
58 Correct 30 ms 25976 KB Output is correct
59 Correct 28 ms 25868 KB Output is correct
60 Correct 27 ms 25848 KB Output is correct
61 Correct 118 ms 33016 KB Output is correct
62 Correct 29 ms 26032 KB Output is correct
63 Correct 121 ms 37240 KB Output is correct
64 Correct 123 ms 33144 KB Output is correct
65 Correct 29 ms 25976 KB Output is correct
66 Correct 132 ms 33400 KB Output is correct
67 Correct 29 ms 26104 KB Output is correct
68 Correct 30 ms 25976 KB Output is correct
69 Correct 100 ms 33292 KB Output is correct
70 Correct 29 ms 26104 KB Output is correct
71 Correct 115 ms 33000 KB Output is correct
72 Correct 130 ms 34356 KB Output is correct
73 Correct 28 ms 25848 KB Output is correct
74 Correct 142 ms 37388 KB Output is correct
75 Correct 119 ms 35192 KB Output is correct
76 Correct 28 ms 26104 KB Output is correct
77 Correct 30 ms 26104 KB Output is correct
78 Correct 102 ms 32236 KB Output is correct
79 Correct 111 ms 34888 KB Output is correct
80 Correct 29 ms 26104 KB Output is correct
81 Correct 29 ms 26076 KB Output is correct
82 Correct 27 ms 25848 KB Output is correct
83 Correct 27 ms 25848 KB Output is correct
84 Correct 29 ms 26104 KB Output is correct
85 Correct 130 ms 34424 KB Output is correct
86 Correct 29 ms 25976 KB Output is correct
87 Correct 125 ms 33244 KB Output is correct
88 Correct 27 ms 25848 KB Output is correct
89 Correct 163 ms 33252 KB Output is correct
90 Correct 138 ms 34412 KB Output is correct
91 Correct 132 ms 36056 KB Output is correct
92 Correct 102 ms 33264 KB Output is correct
93 Correct 29 ms 26104 KB Output is correct
94 Correct 27 ms 25848 KB Output is correct
95 Correct 109 ms 36060 KB Output is correct
96 Correct 172 ms 38160 KB Output is correct
97 Correct 29 ms 26108 KB Output is correct
98 Correct 36 ms 25852 KB Output is correct
99 Correct 112 ms 34600 KB Output is correct
100 Correct 34 ms 26068 KB Output is correct
101 Correct 140 ms 33528 KB Output is correct
102 Correct 129 ms 37516 KB Output is correct
103 Correct 29 ms 26076 KB Output is correct
104 Correct 30 ms 26188 KB Output is correct
105 Correct 30 ms 26040 KB Output is correct
106 Correct 35 ms 26108 KB Output is correct
107 Correct 30 ms 26004 KB Output is correct
108 Correct 700 ms 70072 KB Output is correct
109 Correct 852 ms 72148 KB Output is correct
110 Correct 819 ms 78840 KB Output is correct
111 Correct 899 ms 91044 KB Output is correct
112 Correct 976 ms 85744 KB Output is correct
113 Correct 601 ms 77900 KB Output is correct
114 Correct 733 ms 61704 KB Output is correct
115 Correct 765 ms 61672 KB Output is correct
116 Correct 905 ms 66808 KB Output is correct
117 Correct 780 ms 78024 KB Output is correct
118 Correct 722 ms 63352 KB Output is correct
119 Correct 813 ms 77944 KB Output is correct
120 Correct 807 ms 86080 KB Output is correct
121 Correct 785 ms 78080 KB Output is correct
122 Correct 876 ms 71672 KB Output is correct
123 Correct 724 ms 79532 KB Output is correct
124 Correct 865 ms 76620 KB Output is correct