답안 #934354

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
934354	2024-02-27T08:07:06 Z	penguin133	Mergers (JOI19_mergers)	C++17	100 / 100	1104 ms	223436 KB

mergers

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, k;
int S[500005], A[500005];
vector <int> adj[500005];
int deg[500005];
vector <int> shit[500005];
map <int, int> mp[500005];

pi dp[500005];

void dfs(int x, int par){
	mp[x][S[x]] = 1;
	int cnt = 0;
	for(auto i : adj[x]){
		if(i == par)continue;
		dfs(i, x);
		cnt += (mp[i].empty());
		if(shit[x].size() < shit[i].size())swap(shit[x], shit[i]);
		for(auto j : shit[i])shit[x].push_back(j);
		dp[x].fi += dp[i].fi;
		dp[x].se += dp[i].se;
		if(dp[x].se >= 3){
			dp[x].fi += dp[x].se / 2, dp[x].se %= 2;
			if(!dp[x].se)dp[x].se = 2, dp[x].fi--;
		}
		if(mp[x].size() < mp[i].size())swap(mp[x], mp[i]);
		for(auto [j, k] : mp[i]){
			mp[x][j] += k;
			if(mp[x][j] == A[j])mp[x].erase(j);
		}
	}
	if(mp[x].find(S[x]) != mp[x].end() && mp[x][S[x]] == A[S[x]])mp[x].erase(S[x]);
	if(mp[x].empty()){
		deg[x] += shit[x].size();
		for(auto i : shit[x])deg[i]++;
		shit[x] = {x};
	}
	/*
	cout << x << '\n';
	for(auto [i, j] : mp[x])cout << i << ' ' << j << '\n';
	cout << '\n';
	*/
}

void solve(){
	cin >> n >> k;
	for(int i = 1; i < n; i++){
		int a, b; cin >> a >> b;
		adj[a].push_back(b); adj[b].push_back(a);
	}
	for(int i = 1; i <= n; i++)cin >> S[i], A[S[i]]++;
	dfs(1, -1);
	//cout << dp[1].fi + dp[1].se;
	//cout << dp[1].fi + (dp[1].se + 1) / 2;
	int ans = 0;
	for(int i = 1; i <= n; i++)ans += (deg[i] == 1);
	cout << (ans + 1) / 2;
}

main(){
	ios::sync_with_stdio(0);cin.tie(0);
	int tc = 1;
	//cin >> tc;
	for(int tc1=1;tc1<=tc;tc1++){
		// cout << "Case #" << tc1 << ": ";
		solve();
	}
}

Compilation message

mergers.cpp:72:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   72 | main(){
      | ^~~~

Subtask #1

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	53592 KB	Output is correct
2	Correct	13 ms	53592 KB	Output is correct
3	Correct	13 ms	53592 KB	Output is correct
4	Correct	12 ms	53720 KB	Output is correct
5	Correct	12 ms	53592 KB	Output is correct
6	Correct	13 ms	53596 KB	Output is correct
7	Correct	12 ms	53684 KB	Output is correct
8	Correct	12 ms	53596 KB	Output is correct
9	Correct	12 ms	53820 KB	Output is correct
10	Correct	12 ms	53820 KB	Output is correct
11	Correct	18 ms	53596 KB	Output is correct
12	Correct	12 ms	53596 KB	Output is correct
13	Correct	12 ms	53720 KB	Output is correct
14	Correct	13 ms	53848 KB	Output is correct
15	Correct	12 ms	53720 KB	Output is correct
16	Correct	12 ms	53596 KB	Output is correct
17	Correct	12 ms	53728 KB	Output is correct
18	Correct	12 ms	53596 KB	Output is correct
19	Correct	13 ms	53596 KB	Output is correct
20	Correct	13 ms	53728 KB	Output is correct
21	Correct	12 ms	53592 KB	Output is correct
22	Correct	14 ms	53592 KB	Output is correct
23	Correct	12 ms	53596 KB	Output is correct
24	Correct	12 ms	53596 KB	Output is correct

Subtask #2

24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	53592 KB	Output is correct
2	Correct	13 ms	53592 KB	Output is correct
3	Correct	13 ms	53592 KB	Output is correct
4	Correct	12 ms	53720 KB	Output is correct
5	Correct	12 ms	53592 KB	Output is correct
6	Correct	13 ms	53596 KB	Output is correct
7	Correct	12 ms	53684 KB	Output is correct
8	Correct	12 ms	53596 KB	Output is correct
9	Correct	12 ms	53820 KB	Output is correct
10	Correct	12 ms	53820 KB	Output is correct
11	Correct	18 ms	53596 KB	Output is correct
12	Correct	12 ms	53596 KB	Output is correct
13	Correct	12 ms	53720 KB	Output is correct
14	Correct	13 ms	53848 KB	Output is correct
15	Correct	12 ms	53720 KB	Output is correct
16	Correct	12 ms	53596 KB	Output is correct
17	Correct	12 ms	53728 KB	Output is correct
18	Correct	12 ms	53596 KB	Output is correct
19	Correct	13 ms	53596 KB	Output is correct
20	Correct	13 ms	53728 KB	Output is correct
21	Correct	12 ms	53592 KB	Output is correct
22	Correct	14 ms	53592 KB	Output is correct
23	Correct	12 ms	53596 KB	Output is correct
24	Correct	12 ms	53596 KB	Output is correct
25	Correct	13 ms	53596 KB	Output is correct
26	Correct	14 ms	54108 KB	Output is correct
27	Correct	15 ms	54228 KB	Output is correct
28	Correct	14 ms	54360 KB	Output is correct
29	Correct	15 ms	53848 KB	Output is correct
30	Correct	14 ms	54364 KB	Output is correct
31	Correct	13 ms	53820 KB	Output is correct
32	Correct	14 ms	54364 KB	Output is correct
33	Correct	12 ms	53740 KB	Output is correct
34	Correct	13 ms	54108 KB	Output is correct
35	Correct	16 ms	53852 KB	Output is correct
36	Correct	14 ms	54108 KB	Output is correct
37	Correct	15 ms	54408 KB	Output is correct
38	Correct	16 ms	53852 KB	Output is correct
39	Correct	16 ms	54620 KB	Output is correct
40	Correct	15 ms	54108 KB	Output is correct
41	Correct	14 ms	53964 KB	Output is correct
42	Correct	15 ms	54108 KB	Output is correct
43	Correct	15 ms	54616 KB	Output is correct
44	Correct	12 ms	53596 KB	Output is correct
45	Correct	14 ms	54104 KB	Output is correct
46	Correct	15 ms	54108 KB	Output is correct
47	Correct	13 ms	53592 KB	Output is correct
48	Correct	14 ms	54108 KB	Output is correct
49	Correct	14 ms	54108 KB	Output is correct
50	Correct	14 ms	54108 KB	Output is correct
51	Correct	14 ms	54108 KB	Output is correct
52	Correct	14 ms	54108 KB	Output is correct
53	Correct	14 ms	54168 KB	Output is correct
54	Correct	14 ms	54364 KB	Output is correct

Subtask #3

14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	53592 KB	Output is correct
2	Correct	13 ms	53592 KB	Output is correct
3	Correct	13 ms	53592 KB	Output is correct
4	Correct	12 ms	53720 KB	Output is correct
5	Correct	12 ms	53592 KB	Output is correct
6	Correct	13 ms	53596 KB	Output is correct
7	Correct	12 ms	53684 KB	Output is correct
8	Correct	12 ms	53596 KB	Output is correct
9	Correct	12 ms	53820 KB	Output is correct
10	Correct	12 ms	53820 KB	Output is correct
11	Correct	18 ms	53596 KB	Output is correct
12	Correct	12 ms	53596 KB	Output is correct
13	Correct	12 ms	53720 KB	Output is correct
14	Correct	13 ms	53848 KB	Output is correct
15	Correct	12 ms	53720 KB	Output is correct
16	Correct	12 ms	53596 KB	Output is correct
17	Correct	12 ms	53728 KB	Output is correct
18	Correct	12 ms	53596 KB	Output is correct
19	Correct	13 ms	53596 KB	Output is correct
20	Correct	13 ms	53728 KB	Output is correct
21	Correct	12 ms	53592 KB	Output is correct
22	Correct	14 ms	53592 KB	Output is correct
23	Correct	12 ms	53596 KB	Output is correct
24	Correct	12 ms	53596 KB	Output is correct
25	Correct	14 ms	53704 KB	Output is correct
26	Correct	61 ms	65288 KB	Output is correct
27	Correct	112 ms	75676 KB	Output is correct
28	Correct	14 ms	54108 KB	Output is correct
29	Correct	13 ms	53596 KB	Output is correct
30	Correct	14 ms	53596 KB	Output is correct
31	Correct	74 ms	68628 KB	Output is correct
32	Correct	14 ms	54008 KB	Output is correct
33	Correct	109 ms	83540 KB	Output is correct
34	Correct	99 ms	76568 KB	Output is correct
35	Correct	14 ms	54104 KB	Output is correct
36	Correct	97 ms	70076 KB	Output is correct
37	Correct	14 ms	54108 KB	Output is correct
38	Correct	15 ms	54104 KB	Output is correct
39	Correct	66 ms	65272 KB	Output is correct
40	Correct	14 ms	54616 KB	Output is correct
41	Correct	69 ms	66492 KB	Output is correct
42	Correct	91 ms	73928 KB	Output is correct
43	Correct	14 ms	53596 KB	Output is correct
44	Correct	89 ms	84048 KB	Output is correct
45	Correct	102 ms	77908 KB	Output is correct
46	Correct	14 ms	54108 KB	Output is correct
47	Correct	15 ms	54364 KB	Output is correct

Subtask #4

22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	59 ms	65316 KB	Output is correct
2	Correct	67 ms	65312 KB	Output is correct
3	Correct	15 ms	54104 KB	Output is correct
4	Correct	14 ms	54104 KB	Output is correct
5	Correct	12 ms	53596 KB	Output is correct
6	Correct	13 ms	53596 KB	Output is correct
7	Correct	14 ms	54108 KB	Output is correct
8	Correct	101 ms	73292 KB	Output is correct
9	Correct	13 ms	54104 KB	Output is correct
10	Correct	76 ms	68692 KB	Output is correct
11	Correct	12 ms	53592 KB	Output is correct
12	Correct	96 ms	68800 KB	Output is correct
13	Correct	83 ms	68688 KB	Output is correct
14	Correct	75 ms	64596 KB	Output is correct
15	Correct	65 ms	65372 KB	Output is correct
16	Correct	14 ms	54108 KB	Output is correct
17	Correct	12 ms	53596 KB	Output is correct
18	Correct	90 ms	66352 KB	Output is correct
19	Correct	96 ms	75172 KB	Output is correct
20	Correct	15 ms	54108 KB	Output is correct
21	Correct	13 ms	53596 KB	Output is correct
22	Correct	94 ms	67056 KB	Output is correct
23	Correct	14 ms	54092 KB	Output is correct
24	Correct	82 ms	68180 KB	Output is correct
25	Correct	93 ms	72272 KB	Output is correct
26	Correct	14 ms	54108 KB	Output is correct
27	Correct	14 ms	54268 KB	Output is correct
28	Correct	16 ms	54108 KB	Output is correct
29	Correct	15 ms	53992 KB	Output is correct
30	Correct	15 ms	54304 KB	Output is correct

Subtask #5

30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	12 ms	53592 KB	Output is correct
2	Correct	13 ms	53592 KB	Output is correct
3	Correct	13 ms	53592 KB	Output is correct
4	Correct	12 ms	53720 KB	Output is correct
5	Correct	12 ms	53592 KB	Output is correct
6	Correct	13 ms	53596 KB	Output is correct
7	Correct	12 ms	53684 KB	Output is correct
8	Correct	12 ms	53596 KB	Output is correct
9	Correct	12 ms	53820 KB	Output is correct
10	Correct	12 ms	53820 KB	Output is correct
11	Correct	18 ms	53596 KB	Output is correct
12	Correct	12 ms	53596 KB	Output is correct
13	Correct	12 ms	53720 KB	Output is correct
14	Correct	13 ms	53848 KB	Output is correct
15	Correct	12 ms	53720 KB	Output is correct
16	Correct	12 ms	53596 KB	Output is correct
17	Correct	12 ms	53728 KB	Output is correct
18	Correct	12 ms	53596 KB	Output is correct
19	Correct	13 ms	53596 KB	Output is correct
20	Correct	13 ms	53728 KB	Output is correct
21	Correct	12 ms	53592 KB	Output is correct
22	Correct	14 ms	53592 KB	Output is correct
23	Correct	12 ms	53596 KB	Output is correct
24	Correct	12 ms	53596 KB	Output is correct
25	Correct	13 ms	53596 KB	Output is correct
26	Correct	14 ms	54108 KB	Output is correct
27	Correct	15 ms	54228 KB	Output is correct
28	Correct	14 ms	54360 KB	Output is correct
29	Correct	15 ms	53848 KB	Output is correct
30	Correct	14 ms	54364 KB	Output is correct
31	Correct	13 ms	53820 KB	Output is correct
32	Correct	14 ms	54364 KB	Output is correct
33	Correct	12 ms	53740 KB	Output is correct
34	Correct	13 ms	54108 KB	Output is correct
35	Correct	16 ms	53852 KB	Output is correct
36	Correct	14 ms	54108 KB	Output is correct
37	Correct	15 ms	54408 KB	Output is correct
38	Correct	16 ms	53852 KB	Output is correct
39	Correct	16 ms	54620 KB	Output is correct
40	Correct	15 ms	54108 KB	Output is correct
41	Correct	14 ms	53964 KB	Output is correct
42	Correct	15 ms	54108 KB	Output is correct
43	Correct	15 ms	54616 KB	Output is correct
44	Correct	12 ms	53596 KB	Output is correct
45	Correct	14 ms	54104 KB	Output is correct
46	Correct	15 ms	54108 KB	Output is correct
47	Correct	13 ms	53592 KB	Output is correct
48	Correct	14 ms	54108 KB	Output is correct
49	Correct	14 ms	54108 KB	Output is correct
50	Correct	14 ms	54108 KB	Output is correct
51	Correct	14 ms	54108 KB	Output is correct
52	Correct	14 ms	54108 KB	Output is correct
53	Correct	14 ms	54168 KB	Output is correct
54	Correct	14 ms	54364 KB	Output is correct
55	Correct	14 ms	53704 KB	Output is correct
56	Correct	61 ms	65288 KB	Output is correct
57	Correct	112 ms	75676 KB	Output is correct
58	Correct	14 ms	54108 KB	Output is correct
59	Correct	13 ms	53596 KB	Output is correct
60	Correct	14 ms	53596 KB	Output is correct
61	Correct	74 ms	68628 KB	Output is correct
62	Correct	14 ms	54008 KB	Output is correct
63	Correct	109 ms	83540 KB	Output is correct
64	Correct	99 ms	76568 KB	Output is correct
65	Correct	14 ms	54104 KB	Output is correct
66	Correct	97 ms	70076 KB	Output is correct
67	Correct	14 ms	54108 KB	Output is correct
68	Correct	15 ms	54104 KB	Output is correct
69	Correct	66 ms	65272 KB	Output is correct
70	Correct	14 ms	54616 KB	Output is correct
71	Correct	69 ms	66492 KB	Output is correct
72	Correct	91 ms	73928 KB	Output is correct
73	Correct	14 ms	53596 KB	Output is correct
74	Correct	89 ms	84048 KB	Output is correct
75	Correct	102 ms	77908 KB	Output is correct
76	Correct	14 ms	54108 KB	Output is correct
77	Correct	15 ms	54364 KB	Output is correct
78	Correct	59 ms	65316 KB	Output is correct
79	Correct	67 ms	65312 KB	Output is correct
80	Correct	15 ms	54104 KB	Output is correct
81	Correct	14 ms	54104 KB	Output is correct
82	Correct	12 ms	53596 KB	Output is correct
83	Correct	13 ms	53596 KB	Output is correct
84	Correct	14 ms	54108 KB	Output is correct
85	Correct	101 ms	73292 KB	Output is correct
86	Correct	13 ms	54104 KB	Output is correct
87	Correct	76 ms	68692 KB	Output is correct
88	Correct	12 ms	53592 KB	Output is correct
89	Correct	96 ms	68800 KB	Output is correct
90	Correct	83 ms	68688 KB	Output is correct
91	Correct	75 ms	64596 KB	Output is correct
92	Correct	65 ms	65372 KB	Output is correct
93	Correct	14 ms	54108 KB	Output is correct
94	Correct	12 ms	53596 KB	Output is correct
95	Correct	90 ms	66352 KB	Output is correct
96	Correct	96 ms	75172 KB	Output is correct
97	Correct	15 ms	54108 KB	Output is correct
98	Correct	13 ms	53596 KB	Output is correct
99	Correct	94 ms	67056 KB	Output is correct
100	Correct	14 ms	54092 KB	Output is correct
101	Correct	82 ms	68180 KB	Output is correct
102	Correct	93 ms	72272 KB	Output is correct
103	Correct	14 ms	54108 KB	Output is correct
104	Correct	14 ms	54268 KB	Output is correct
105	Correct	16 ms	54108 KB	Output is correct
106	Correct	15 ms	53992 KB	Output is correct
107	Correct	15 ms	54304 KB	Output is correct
108	Correct	709 ms	120376 KB	Output is correct
109	Correct	625 ms	163920 KB	Output is correct
110	Correct	677 ms	188904 KB	Output is correct
111	Correct	717 ms	168076 KB	Output is correct
112	Correct	854 ms	154612 KB	Output is correct
113	Correct	543 ms	112236 KB	Output is correct
114	Correct	548 ms	120656 KB	Output is correct
115	Correct	570 ms	120280 KB	Output is correct
116	Correct	855 ms	200576 KB	Output is correct
117	Correct	544 ms	104532 KB	Output is correct
118	Correct	524 ms	122160 KB	Output is correct
119	Correct	537 ms	104732 KB	Output is correct
120	Correct	658 ms	145852 KB	Output is correct
121	Correct	560 ms	105156 KB	Output is correct
122	Correct	1104 ms	223436 KB	Output is correct
123	Correct	451 ms	109900 KB	Output is correct
124	Correct	620 ms	103760 KB	Output is correct