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답안 #262616

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
262616 2020-08-13T05:21:51 Z dennisstar 수도 (JOI20_capital_city) C++17
100 / 100
 922 ms 34216 KB 
#include <bits/stdc++.h>
#define eb emplace_back
using namespace std;
using pii=pair<int, int>;

const int MX = 2e5 + 5;

int N, K, C[MX];
int A, vis[MX], sz[MX];
vector<int> adj[MX], ele[MX];

int P[MX], cnt[MX], use[MX], clh[MX];
void d1(int n, int p) {
	sz[n]=1; cnt[C[n]]++;
	for (auto &i:adj[n])
		if (i!=p&&!vis[i]) d1(i, n), sz[n]+=sz[i];
}

int d2(int n, int p, int c) {
	for (auto &i:adj[n])
		if (i!=p&&!vis[i]&&sz[i]>=c) return d2(i, n, c);
	return n;
}

void d3(int n, int p) {
	P[n]=p;
	for (auto &i:adj[n])
		if (i!=p&&!vis[i]) d3(i, n);
}

void d4(int n, int p) {
	cnt[C[n]]=0;
	for (auto &i:adj[n])
		if (i!=p&&!vis[i]) d4(i, n);
}

void sol(int st) {
	d1(st, 0);
	int c=d2(st, 0, sz[st]/2+1);
	d3(c, 0);

	int fl=0, d=0;
	vector<int> s; s.eb(c);
	for (int i=0; i<s.size(); i++) {
		int x=s[i];
		if (use[x]) continue;
		use[x]=1;
		if (ele[C[x]].size()!=cnt[C[x]]) { fl=1; break; }
		if (!clh[C[x]]) {
			clh[C[x]]=1;
			d++;
			for (auto &j:ele[C[x]]) s.eb(j);
		}
		if (P[x]) s.eb(P[x]);
	}
	if (!fl) A=min(A, d);
	for (auto &i:s) use[i]=0, clh[C[i]]=0;
	d4(st, 0);
	s.clear();

	vis[c]=1;
	for (auto &i:adj[c]) if (!vis[i]) sol(i);
}

int main() {
	cin.tie(0)->sync_with_stdio(0);

	cin>>N>>K;
	for (int i=1, u, v; i<N; i++) cin>>u>>v, adj[u].eb(v), adj[v].eb(u);
	for (int i=1; i<=N; i++) cin>>C[i], ele[C[i]].eb(i);

	A=MX;
	sol(1);

	cout<<A-1<<'\n';
	return 0;
}

Compilation message

capital_city.cpp: In function 'void sol(int)':
capital_city.cpp:44:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |  for (int i=0; i<s.size(); i++) {
      |                ~^~~~~~~~~
capital_city.cpp:48:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   48 |   if (ele[C[x]].size()!=cnt[C[x]]) { fl=1; break; }
      |       ~~~~~~~~~~~~~~~~^~~~~~~~~~~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 8 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 8 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 8 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 8 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 11 ms 9984 KB Output is correct
12 Correct 9 ms 9984 KB Output is correct
13 Correct 10 ms 9984 KB Output is correct
14 Correct 11 ms 9984 KB Output is correct
15 Correct 10 ms 9984 KB Output is correct
16 Correct 9 ms 9856 KB Output is correct
17 Correct 8 ms 9984 KB Output is correct
18 Correct 8 ms 10112 KB Output is correct
19 Correct 8 ms 9984 KB Output is correct
20 Correct 8 ms 10112 KB Output is correct
21 Correct 8 ms 9984 KB Output is correct
22 Correct 8 ms 9984 KB Output is correct
23 Correct 8 ms 9984 KB Output is correct
24 Correct 9 ms 9984 KB Output is correct
25 Correct 9 ms 9984 KB Output is correct
26 Correct 9 ms 9984 KB Output is correct
27 Correct 9 ms 9984 KB Output is correct
28 Correct 9 ms 9984 KB Output is correct
29 Correct 9 ms 9984 KB Output is correct
30 Correct 9 ms 9984 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 694 ms 33056 KB Output is correct
2 Correct 229 ms 33148 KB Output is correct
3 Correct 681 ms 32760 KB Output is correct
4 Correct 233 ms 33144 KB Output is correct
5 Correct 674 ms 31096 KB Output is correct
6 Correct 239 ms 33272 KB Output is correct
7 Correct 662 ms 31476 KB Output is correct
8 Correct 268 ms 33392 KB Output is correct
9 Correct 909 ms 31016 KB Output is correct
10 Correct 910 ms 29576 KB Output is correct
11 Correct 872 ms 32236 KB Output is correct
12 Correct 845 ms 33516 KB Output is correct
13 Correct 843 ms 29168 KB Output is correct
14 Correct 857 ms 33008 KB Output is correct
15 Correct 841 ms 32808 KB Output is correct
16 Correct 831 ms 29864 KB Output is correct
17 Correct 855 ms 30312 KB Output is correct
18 Correct 831 ms 30952 KB Output is correct
19 Correct 842 ms 32268 KB Output is correct
20 Correct 833 ms 34216 KB Output is correct
21 Correct 7 ms 9728 KB Output is correct

Subtask #4
59.0 / 59.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 6 ms 9728 KB Output is correct
3 Correct 8 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 8 ms 9728 KB Output is correct
6 Correct 8 ms 9728 KB Output is correct
7 Correct 6 ms 9728 KB Output is correct
8 Correct 8 ms 9728 KB Output is correct
9 Correct 6 ms 9728 KB Output is correct
10 Correct 7 ms 9728 KB Output is correct
11 Correct 11 ms 9984 KB Output is correct
12 Correct 9 ms 9984 KB Output is correct
13 Correct 10 ms 9984 KB Output is correct
14 Correct 11 ms 9984 KB Output is correct
15 Correct 10 ms 9984 KB Output is correct
16 Correct 9 ms 9856 KB Output is correct
17 Correct 8 ms 9984 KB Output is correct
18 Correct 8 ms 10112 KB Output is correct
19 Correct 8 ms 9984 KB Output is correct
20 Correct 8 ms 10112 KB Output is correct
21 Correct 8 ms 9984 KB Output is correct
22 Correct 8 ms 9984 KB Output is correct
23 Correct 8 ms 9984 KB Output is correct
24 Correct 9 ms 9984 KB Output is correct
25 Correct 9 ms 9984 KB Output is correct
26 Correct 9 ms 9984 KB Output is correct
27 Correct 9 ms 9984 KB Output is correct
28 Correct 9 ms 9984 KB Output is correct
29 Correct 9 ms 9984 KB Output is correct
30 Correct 9 ms 9984 KB Output is correct
31 Correct 694 ms 33056 KB Output is correct
32 Correct 229 ms 33148 KB Output is correct
33 Correct 681 ms 32760 KB Output is correct
34 Correct 233 ms 33144 KB Output is correct
35 Correct 674 ms 31096 KB Output is correct
36 Correct 239 ms 33272 KB Output is correct
37 Correct 662 ms 31476 KB Output is correct
38 Correct 268 ms 33392 KB Output is correct
39 Correct 909 ms 31016 KB Output is correct
40 Correct 910 ms 29576 KB Output is correct
41 Correct 872 ms 32236 KB Output is correct
42 Correct 845 ms 33516 KB Output is correct
43 Correct 843 ms 29168 KB Output is correct
44 Correct 857 ms 33008 KB Output is correct
45 Correct 841 ms 32808 KB Output is correct
46 Correct 831 ms 29864 KB Output is correct
47 Correct 855 ms 30312 KB Output is correct
48 Correct 831 ms 30952 KB Output is correct
49 Correct 842 ms 32268 KB Output is correct
50 Correct 833 ms 34216 KB Output is correct
51 Correct 7 ms 9728 KB Output is correct
52 Correct 597 ms 23528 KB Output is correct
53 Correct 705 ms 23524 KB Output is correct
54 Correct 658 ms 23652 KB Output is correct
55 Correct 715 ms 23656 KB Output is correct
56 Correct 639 ms 23484 KB Output is correct
57 Correct 629 ms 23580 KB Output is correct
58 Correct 590 ms 25612 KB Output is correct
59 Correct 555 ms 25116 KB Output is correct
60 Correct 673 ms 25180 KB Output is correct
61 Correct 747 ms 25332 KB Output is correct
62 Correct 226 ms 33272 KB Output is correct
63 Correct 228 ms 33144 KB Output is correct
64 Correct 227 ms 33212 KB Output is correct
65 Correct 239 ms 33272 KB Output is correct
66 Correct 426 ms 28332 KB Output is correct
67 Correct 488 ms 28332 KB Output is correct
68 Correct 479 ms 28332 KB Output is correct
69 Correct 541 ms 28332 KB Output is correct
70 Correct 500 ms 28292 KB Output is correct
71 Correct 478 ms 28460 KB Output is correct
72 Correct 431 ms 28332 KB Output is correct
73 Correct 451 ms 27856 KB Output is correct
74 Correct 455 ms 28332 KB Output is correct
75 Correct 485 ms 28332 KB Output is correct
76 Correct 750 ms 28484 KB Output is correct
77 Correct 709 ms 27380 KB Output is correct
78 Correct 877 ms 30832 KB Output is correct
79 Correct 834 ms 29676 KB Output is correct
80 Correct 891 ms 34028 KB Output is correct
81 Correct 922 ms 31168 KB Output is correct
82 Correct 898 ms 31208 KB Output is correct
83 Correct 812 ms 29352 KB Output is correct
84 Correct 856 ms 32852 KB Output is correct
85 Correct 834 ms 32364 KB Output is correct
86 Correct 876 ms 29548 KB Output is correct
87 Correct 829 ms 30064 KB Output is correct
88 Correct 698 ms 30320 KB Output is correct
89 Correct 690 ms 27888 KB Output is correct
90 Correct 729 ms 28012 KB Output is correct
91 Correct 784 ms 29348 KB Output is correct
92 Correct 762 ms 28720 KB Output is correct
93 Correct 722 ms 28272 KB Output is correct
94 Correct 697 ms 27884 KB Output is correct
95 Correct 740 ms 28776 KB Output is correct
96 Correct 736 ms 28300 KB Output is correct
97 Correct 704 ms 30056 KB Output is correct