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Submission #379818

# Submission time Handle Problem Language Result Execution time Memory
379818 2021-03-19T11:15:57 Z cgiosy Mergers (JOI19_mergers) C++17
100 / 100
 799 ms 78956 KB 
#include <bits/stdc++.h>
using namespace std;

int main() {
	ios::sync_with_stdio(0);cin.tie(0);
	int N, M, ans=0, t=0;
	cin>>N>>M;
	if(N<3) { cout<<M-1<<'\n'; return 0; }

	vector<int> C(N), L(M), R(M);
	vector<vector<int>> G(N);
	for(int i=1; i<N; i++) {
		int x, y;
		cin>>x>>y; --x, --y;
		G[x].push_back(y);
		G[y].push_back(x);
	}
	for(int i=0; i<N; i++) cin>>C[i], --C[i];

	function<void(int, int)> f=[&](int i, int p) {
		++t;
		L[C[i]]=L[C[i]]?:t;
		for(int j:G[i]) if(j!=p) f(j, i);
		R[C[i]]=t;
	};
	f(0, 0);

	t=0;
	function<tuple<int, int, int>(int, int)> g=[&](int i, int p) {
		++t;
		int a=L[C[i]], b=R[C[i]], x=0, s=t;
		for(int j:G[i]) if(j!=p) {
			auto[c,d,y]=g(j, i);
			a=min(a, c);
			b=max(b, d);
			x+=y;
		}
		if(s==a && b==t && i) ans+=!x, x=1;
		return make_tuple(a, b, x);
	};
	int r=get<2>(g(0, 0))==1;
	cout<<(ans+r+1)/2<<'\n';
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 492 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 492 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 2 ms 620 KB Output is correct
27 Correct 3 ms 620 KB Output is correct
28 Correct 3 ms 768 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 492 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 3 ms 876 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 2 ms 620 KB Output is correct
35 Correct 2 ms 620 KB Output is correct
36 Correct 2 ms 492 KB Output is correct
37 Correct 2 ms 620 KB Output is correct
38 Correct 23 ms 364 KB Output is correct
39 Correct 2 ms 620 KB Output is correct
40 Correct 2 ms 492 KB Output is correct
41 Correct 2 ms 492 KB Output is correct
42 Correct 2 ms 620 KB Output is correct
43 Correct 4 ms 876 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 3 ms 620 KB Output is correct
46 Correct 2 ms 620 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 2 ms 620 KB Output is correct
49 Correct 2 ms 620 KB Output is correct
50 Correct 3 ms 620 KB Output is correct
51 Correct 2 ms 620 KB Output is correct
52 Correct 2 ms 620 KB Output is correct
53 Correct 2 ms 620 KB Output is correct
54 Correct 2 ms 492 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 492 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 50 ms 7404 KB Output is correct
27 Correct 73 ms 7148 KB Output is correct
28 Correct 2 ms 620 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 81 ms 7148 KB Output is correct
32 Correct 2 ms 620 KB Output is correct
33 Correct 115 ms 18924 KB Output is correct
34 Correct 75 ms 7404 KB Output is correct
35 Correct 2 ms 492 KB Output is correct
36 Correct 80 ms 8544 KB Output is correct
37 Correct 2 ms 492 KB Output is correct
38 Correct 2 ms 492 KB Output is correct
39 Correct 57 ms 7908 KB Output is correct
40 Correct 2 ms 876 KB Output is correct
41 Correct 107 ms 7532 KB Output is correct
42 Correct 104 ms 11372 KB Output is correct
43 Correct 1 ms 364 KB Output is correct
44 Correct 98 ms 19564 KB Output is correct
45 Correct 83 ms 13548 KB Output is correct
46 Correct 2 ms 620 KB Output is correct
47 Correct 2 ms 492 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 49 ms 7012 KB Output is correct
2 Correct 61 ms 7908 KB Output is correct
3 Correct 2 ms 620 KB Output is correct
4 Correct 2 ms 620 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 81 ms 7916 KB Output is correct
9 Correct 2 ms 492 KB Output is correct
10 Correct 98 ms 7276 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 107 ms 7148 KB Output is correct
13 Correct 84 ms 7532 KB Output is correct
14 Correct 87 ms 8172 KB Output is correct
15 Correct 50 ms 7524 KB Output is correct
16 Correct 2 ms 620 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 59 ms 8144 KB Output is correct
19 Correct 99 ms 14316 KB Output is correct
20 Correct 2 ms 620 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 54 ms 7908 KB Output is correct
23 Correct 2 ms 620 KB Output is correct
24 Correct 92 ms 7276 KB Output is correct
25 Correct 96 ms 12140 KB Output is correct
26 Correct 3 ms 620 KB Output is correct
27 Correct 2 ms 620 KB Output is correct
28 Correct 2 ms 620 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 620 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 0 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 0 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 492 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 2 ms 620 KB Output is correct
27 Correct 3 ms 620 KB Output is correct
28 Correct 3 ms 768 KB Output is correct
29 Correct 2 ms 620 KB Output is correct
30 Correct 2 ms 492 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 3 ms 876 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 2 ms 620 KB Output is correct
35 Correct 2 ms 620 KB Output is correct
36 Correct 2 ms 492 KB Output is correct
37 Correct 2 ms 620 KB Output is correct
38 Correct 23 ms 364 KB Output is correct
39 Correct 2 ms 620 KB Output is correct
40 Correct 2 ms 492 KB Output is correct
41 Correct 2 ms 492 KB Output is correct
42 Correct 2 ms 620 KB Output is correct
43 Correct 4 ms 876 KB Output is correct
44 Correct 1 ms 364 KB Output is correct
45 Correct 3 ms 620 KB Output is correct
46 Correct 2 ms 620 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 2 ms 620 KB Output is correct
49 Correct 2 ms 620 KB Output is correct
50 Correct 3 ms 620 KB Output is correct
51 Correct 2 ms 620 KB Output is correct
52 Correct 2 ms 620 KB Output is correct
53 Correct 2 ms 620 KB Output is correct
54 Correct 2 ms 492 KB Output is correct
55 Correct 1 ms 364 KB Output is correct
56 Correct 50 ms 7404 KB Output is correct
57 Correct 73 ms 7148 KB Output is correct
58 Correct 2 ms 620 KB Output is correct
59 Correct 1 ms 364 KB Output is correct
60 Correct 1 ms 364 KB Output is correct
61 Correct 81 ms 7148 KB Output is correct
62 Correct 2 ms 620 KB Output is correct
63 Correct 115 ms 18924 KB Output is correct
64 Correct 75 ms 7404 KB Output is correct
65 Correct 2 ms 492 KB Output is correct
66 Correct 80 ms 8544 KB Output is correct
67 Correct 2 ms 492 KB Output is correct
68 Correct 2 ms 492 KB Output is correct
69 Correct 57 ms 7908 KB Output is correct
70 Correct 2 ms 876 KB Output is correct
71 Correct 107 ms 7532 KB Output is correct
72 Correct 104 ms 11372 KB Output is correct
73 Correct 1 ms 364 KB Output is correct
74 Correct 98 ms 19564 KB Output is correct
75 Correct 83 ms 13548 KB Output is correct
76 Correct 2 ms 620 KB Output is correct
77 Correct 2 ms 492 KB Output is correct
78 Correct 49 ms 7012 KB Output is correct
79 Correct 61 ms 7908 KB Output is correct
80 Correct 2 ms 620 KB Output is correct
81 Correct 2 ms 620 KB Output is correct
82 Correct 1 ms 364 KB Output is correct
83 Correct 1 ms 364 KB Output is correct
84 Correct 2 ms 620 KB Output is correct
85 Correct 81 ms 7916 KB Output is correct
86 Correct 2 ms 492 KB Output is correct
87 Correct 98 ms 7276 KB Output is correct
88 Correct 1 ms 364 KB Output is correct
89 Correct 107 ms 7148 KB Output is correct
90 Correct 84 ms 7532 KB Output is correct
91 Correct 87 ms 8172 KB Output is correct
92 Correct 50 ms 7524 KB Output is correct
93 Correct 2 ms 620 KB Output is correct
94 Correct 1 ms 364 KB Output is correct
95 Correct 59 ms 8144 KB Output is correct
96 Correct 99 ms 14316 KB Output is correct
97 Correct 2 ms 620 KB Output is correct
98 Correct 1 ms 364 KB Output is correct
99 Correct 54 ms 7908 KB Output is correct
100 Correct 2 ms 620 KB Output is correct
101 Correct 92 ms 7276 KB Output is correct
102 Correct 96 ms 12140 KB Output is correct
103 Correct 3 ms 620 KB Output is correct
104 Correct 2 ms 620 KB Output is correct
105 Correct 2 ms 620 KB Output is correct
106 Correct 2 ms 620 KB Output is correct
107 Correct 2 ms 620 KB Output is correct
108 Correct 419 ms 34780 KB Output is correct
109 Correct 755 ms 60908 KB Output is correct
110 Correct 766 ms 78956 KB Output is correct
111 Correct 799 ms 72940 KB Output is correct
112 Correct 733 ms 57324 KB Output is correct
113 Correct 453 ms 36564 KB Output is correct
114 Correct 650 ms 31724 KB Output is correct
115 Correct 629 ms 31852 KB Output is correct
116 Correct 673 ms 32784 KB Output is correct
117 Correct 685 ms 35820 KB Output is correct
118 Correct 634 ms 31340 KB Output is correct
119 Correct 716 ms 35820 KB Output is correct
120 Correct 773 ms 58604 KB Output is correct
121 Correct 696 ms 35820 KB Output is correct
122 Correct 683 ms 34284 KB Output is correct
123 Correct 449 ms 37128 KB Output is correct
124 Correct 724 ms 35192 KB Output is correct