답안 #416568

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
416568	2021-06-02T16:05:16 Z	amirmohammad_nezami	Mergers (JOI19_mergers)	C++14	100 / 100	1270 ms	144572 KB

mergers

//                                                          In the name of God 
#include <bits/stdc++.h>
using namespace std;
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define lc 2 * v
#define rc 2 * v + 1
#define mid (s + e) / 2
#define _sz(e) (int)e.size()
#define _all(e) e.begin() , e.end()
#define _lcm(a , b) (1ll * a * b) / __gcd(a , b)
#define ll long long
#define int long long
#define ld long double
#define pii pair <int , int>
#define pcc pair <char , char>
#define pll pair <long long , long long>
#define piii pair <int , pair <int , int>>
#define FAST ios::sync_with_stdio(0);cin.tie(0)
#pragma GCC optimize("Ofast")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,avmini,avmini2")

const int maxn = 5e5 + 10 , N = 2e6 + 10 , SQ = 320 , base = 800287 , mod = 1e9 + 7 , INF = 1e18 + 10 , lg = 22;
const ld eps = 1e-4;

int n , k , s[maxn] , mn_st[maxn] , mx_ft[maxn], st[maxn] , ft[maxn] , tme;
int mx_sub[maxn] , mn_sub[maxn] , mark[maxn] , cnt[maxn];
vector <int> edges[maxn];

void dfs1(int v , int p = -1) {
	st[v] = tme++;
	if(mn_st[s[v]] == -1) {
		mn_st[s[v]] = st[v];
	}	

	for (auto u : edges[v]) {
		if(u != p) {
			dfs1(u , v);
		}
	}
	ft[v] = tme;
	mx_ft[s[v]] = ft[v];
}

void dfs2(int v , int p = -1) {
	mn_sub[v] = mn_st[s[v]] , mx_sub[v] = mx_ft[s[v]];
	for (auto u : edges[v]) {
		if(u != p) {
			dfs2(u , v);
			mn_sub[v] = min(mn_sub[v] , mn_sub[u]);
			mx_sub[v] = max(mx_sub[v] , mx_sub[u]);
		}
	}

	if(p != -1 && mn_sub[v] == st[v] && mx_sub[v] == ft[v]) {
		mark[v] = 1;
	}
}

void dfs3(int v , int p = -1 , int root = 0) {
	for (auto u : edges[v]) {
		if(u != p) {
			if(mark[u]) {
				cnt[root]++ , cnt[u]++;
				dfs3(u , v , u);
			}
			else {
				dfs3(u , v , root);
			}
		}
	}
}

int32_t main() {	
	FAST;
	cin >> n >> k;
	for (int i = 0; i < n - 1; ++i) {
		int x , y; cin >> x >> y;
		x-- , y--;
		edges[x].PB(y);
		edges[y].PB(x);
	}
	for (int i = 0; i < n; ++i) {
		cin >> s[i]; s[i]--;
	}
	for (int i = 0; i < k; ++i) {
		mn_st[i] = -1;
	}

	dfs1(0);
	dfs2(0);
	dfs3(0);
	
	int ans = 0;
	for (int i = 0; i < n; ++i) {
		ans += (cnt[i] == 1);
	}
	cout << (ans + 1) / 2 << '\n';
} 

//  Mistakes:
//  * Read the problem carefully.
//  * Check maxn.
//  * Overflows.

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	12048 KB	Output is correct
2	Correct	8 ms	12108 KB	Output is correct
3	Correct	8 ms	12064 KB	Output is correct
4	Correct	9 ms	12060 KB	Output is correct
5	Correct	11 ms	12100 KB	Output is correct
6	Correct	9 ms	12108 KB	Output is correct
7	Correct	8 ms	12108 KB	Output is correct
8	Correct	7 ms	12108 KB	Output is correct
9	Correct	10 ms	12088 KB	Output is correct
10	Correct	10 ms	12064 KB	Output is correct
11	Correct	9 ms	12140 KB	Output is correct
12	Correct	8 ms	12108 KB	Output is correct
13	Correct	7 ms	12060 KB	Output is correct
14	Correct	7 ms	12108 KB	Output is correct
15	Correct	10 ms	12108 KB	Output is correct
16	Correct	11 ms	12076 KB	Output is correct
17	Correct	8 ms	12064 KB	Output is correct
18	Correct	8 ms	12056 KB	Output is correct
19	Correct	9 ms	12064 KB	Output is correct
20	Correct	8 ms	12108 KB	Output is correct
21	Correct	8 ms	12108 KB	Output is correct
22	Correct	11 ms	12128 KB	Output is correct
23	Correct	8 ms	12108 KB	Output is correct
24	Correct	9 ms	12064 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	12048 KB	Output is correct
2	Correct	8 ms	12108 KB	Output is correct
3	Correct	8 ms	12064 KB	Output is correct
4	Correct	9 ms	12060 KB	Output is correct
5	Correct	11 ms	12100 KB	Output is correct
6	Correct	9 ms	12108 KB	Output is correct
7	Correct	8 ms	12108 KB	Output is correct
8	Correct	7 ms	12108 KB	Output is correct
9	Correct	10 ms	12088 KB	Output is correct
10	Correct	10 ms	12064 KB	Output is correct
11	Correct	9 ms	12140 KB	Output is correct
12	Correct	8 ms	12108 KB	Output is correct
13	Correct	7 ms	12060 KB	Output is correct
14	Correct	7 ms	12108 KB	Output is correct
15	Correct	10 ms	12108 KB	Output is correct
16	Correct	11 ms	12076 KB	Output is correct
17	Correct	8 ms	12064 KB	Output is correct
18	Correct	8 ms	12056 KB	Output is correct
19	Correct	9 ms	12064 KB	Output is correct
20	Correct	8 ms	12108 KB	Output is correct
21	Correct	8 ms	12108 KB	Output is correct
22	Correct	11 ms	12128 KB	Output is correct
23	Correct	8 ms	12108 KB	Output is correct
24	Correct	9 ms	12064 KB	Output is correct
25	Correct	8 ms	12108 KB	Output is correct
26	Correct	10 ms	12476 KB	Output is correct
27	Correct	10 ms	12364 KB	Output is correct
28	Correct	10 ms	12620 KB	Output is correct
29	Correct	10 ms	12452 KB	Output is correct
30	Correct	11 ms	12364 KB	Output is correct
31	Correct	7 ms	12108 KB	Output is correct
32	Correct	10 ms	12592 KB	Output is correct
33	Correct	7 ms	12068 KB	Output is correct
34	Correct	10 ms	12368 KB	Output is correct
35	Correct	13 ms	12492 KB	Output is correct
36	Correct	9 ms	12364 KB	Output is correct
37	Correct	11 ms	12380 KB	Output is correct
38	Correct	8 ms	12052 KB	Output is correct
39	Correct	12 ms	12388 KB	Output is correct
40	Correct	11 ms	12364 KB	Output is correct
41	Correct	9 ms	12364 KB	Output is correct
42	Correct	9 ms	12400 KB	Output is correct
43	Correct	9 ms	12588 KB	Output is correct
44	Correct	8 ms	12108 KB	Output is correct
45	Correct	11 ms	12448 KB	Output is correct
46	Correct	10 ms	12364 KB	Output is correct
47	Correct	10 ms	12108 KB	Output is correct
48	Correct	10 ms	12364 KB	Output is correct
49	Correct	9 ms	12492 KB	Output is correct
50	Correct	9 ms	12716 KB	Output is correct
51	Correct	9 ms	12364 KB	Output is correct
52	Correct	24 ms	12324 KB	Output is correct
53	Correct	11 ms	12364 KB	Output is correct
54	Correct	11 ms	12332 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	12048 KB	Output is correct
2	Correct	8 ms	12108 KB	Output is correct
3	Correct	8 ms	12064 KB	Output is correct
4	Correct	9 ms	12060 KB	Output is correct
5	Correct	11 ms	12100 KB	Output is correct
6	Correct	9 ms	12108 KB	Output is correct
7	Correct	8 ms	12108 KB	Output is correct
8	Correct	7 ms	12108 KB	Output is correct
9	Correct	10 ms	12088 KB	Output is correct
10	Correct	10 ms	12064 KB	Output is correct
11	Correct	9 ms	12140 KB	Output is correct
12	Correct	8 ms	12108 KB	Output is correct
13	Correct	7 ms	12060 KB	Output is correct
14	Correct	7 ms	12108 KB	Output is correct
15	Correct	10 ms	12108 KB	Output is correct
16	Correct	11 ms	12076 KB	Output is correct
17	Correct	8 ms	12064 KB	Output is correct
18	Correct	8 ms	12056 KB	Output is correct
19	Correct	9 ms	12064 KB	Output is correct
20	Correct	8 ms	12108 KB	Output is correct
21	Correct	8 ms	12108 KB	Output is correct
22	Correct	11 ms	12128 KB	Output is correct
23	Correct	8 ms	12108 KB	Output is correct
24	Correct	9 ms	12064 KB	Output is correct
25	Correct	14 ms	12068 KB	Output is correct
26	Correct	103 ms	21264 KB	Output is correct
27	Correct	143 ms	21108 KB	Output is correct
28	Correct	9 ms	12364 KB	Output is correct
29	Correct	8 ms	12108 KB	Output is correct
30	Correct	8 ms	12064 KB	Output is correct
31	Correct	122 ms	21508 KB	Output is correct
32	Correct	8 ms	12364 KB	Output is correct
33	Correct	155 ms	27860 KB	Output is correct
34	Correct	132 ms	21124 KB	Output is correct
35	Correct	17 ms	12364 KB	Output is correct
36	Correct	131 ms	21668 KB	Output is correct
37	Correct	9 ms	12364 KB	Output is correct
38	Correct	12 ms	12296 KB	Output is correct
39	Correct	83 ms	21300 KB	Output is correct
40	Correct	9 ms	12592 KB	Output is correct
41	Correct	195 ms	21056 KB	Output is correct
42	Correct	177 ms	22956 KB	Output is correct
43	Correct	8 ms	12108 KB	Output is correct
44	Correct	159 ms	28056 KB	Output is correct
45	Correct	138 ms	25504 KB	Output is correct
46	Correct	11 ms	12328 KB	Output is correct
47	Correct	12 ms	12332 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	143 ms	21344 KB	Output is correct
2	Correct	84 ms	24724 KB	Output is correct
3	Correct	9 ms	12464 KB	Output is correct
4	Correct	10 ms	12408 KB	Output is correct
5	Correct	9 ms	12064 KB	Output is correct
6	Correct	8 ms	12108 KB	Output is correct
7	Correct	10 ms	12364 KB	Output is correct
8	Correct	155 ms	23808 KB	Output is correct
9	Correct	9 ms	12336 KB	Output is correct
10	Correct	177 ms	22828 KB	Output is correct
11	Correct	9 ms	12052 KB	Output is correct
12	Correct	113 ms	22304 KB	Output is correct
13	Correct	149 ms	23748 KB	Output is correct
14	Correct	153 ms	24604 KB	Output is correct
15	Correct	74 ms	21292 KB	Output is correct
16	Correct	9 ms	12468 KB	Output is correct
17	Correct	8 ms	12048 KB	Output is correct
18	Correct	94 ms	24660 KB	Output is correct
19	Correct	235 ms	37684 KB	Output is correct
20	Correct	9 ms	12464 KB	Output is correct
21	Correct	7 ms	12136 KB	Output is correct
22	Correct	87 ms	23880 KB	Output is correct
23	Correct	9 ms	12364 KB	Output is correct
24	Correct	153 ms	22768 KB	Output is correct
25	Correct	176 ms	34292 KB	Output is correct
26	Correct	13 ms	12444 KB	Output is correct
27	Correct	14 ms	12656 KB	Output is correct
28	Correct	12 ms	12332 KB	Output is correct
29	Correct	13 ms	12404 KB	Output is correct
30	Correct	10 ms	12364 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	12048 KB	Output is correct
2	Correct	8 ms	12108 KB	Output is correct
3	Correct	8 ms	12064 KB	Output is correct
4	Correct	9 ms	12060 KB	Output is correct
5	Correct	11 ms	12100 KB	Output is correct
6	Correct	9 ms	12108 KB	Output is correct
7	Correct	8 ms	12108 KB	Output is correct
8	Correct	7 ms	12108 KB	Output is correct
9	Correct	10 ms	12088 KB	Output is correct
10	Correct	10 ms	12064 KB	Output is correct
11	Correct	9 ms	12140 KB	Output is correct
12	Correct	8 ms	12108 KB	Output is correct
13	Correct	7 ms	12060 KB	Output is correct
14	Correct	7 ms	12108 KB	Output is correct
15	Correct	10 ms	12108 KB	Output is correct
16	Correct	11 ms	12076 KB	Output is correct
17	Correct	8 ms	12064 KB	Output is correct
18	Correct	8 ms	12056 KB	Output is correct
19	Correct	9 ms	12064 KB	Output is correct
20	Correct	8 ms	12108 KB	Output is correct
21	Correct	8 ms	12108 KB	Output is correct
22	Correct	11 ms	12128 KB	Output is correct
23	Correct	8 ms	12108 KB	Output is correct
24	Correct	9 ms	12064 KB	Output is correct
25	Correct	8 ms	12108 KB	Output is correct
26	Correct	10 ms	12476 KB	Output is correct
27	Correct	10 ms	12364 KB	Output is correct
28	Correct	10 ms	12620 KB	Output is correct
29	Correct	10 ms	12452 KB	Output is correct
30	Correct	11 ms	12364 KB	Output is correct
31	Correct	7 ms	12108 KB	Output is correct
32	Correct	10 ms	12592 KB	Output is correct
33	Correct	7 ms	12068 KB	Output is correct
34	Correct	10 ms	12368 KB	Output is correct
35	Correct	13 ms	12492 KB	Output is correct
36	Correct	9 ms	12364 KB	Output is correct
37	Correct	11 ms	12380 KB	Output is correct
38	Correct	8 ms	12052 KB	Output is correct
39	Correct	12 ms	12388 KB	Output is correct
40	Correct	11 ms	12364 KB	Output is correct
41	Correct	9 ms	12364 KB	Output is correct
42	Correct	9 ms	12400 KB	Output is correct
43	Correct	9 ms	12588 KB	Output is correct
44	Correct	8 ms	12108 KB	Output is correct
45	Correct	11 ms	12448 KB	Output is correct
46	Correct	10 ms	12364 KB	Output is correct
47	Correct	10 ms	12108 KB	Output is correct
48	Correct	10 ms	12364 KB	Output is correct
49	Correct	9 ms	12492 KB	Output is correct
50	Correct	9 ms	12716 KB	Output is correct
51	Correct	9 ms	12364 KB	Output is correct
52	Correct	24 ms	12324 KB	Output is correct
53	Correct	11 ms	12364 KB	Output is correct
54	Correct	11 ms	12332 KB	Output is correct
55	Correct	14 ms	12068 KB	Output is correct
56	Correct	103 ms	21264 KB	Output is correct
57	Correct	143 ms	21108 KB	Output is correct
58	Correct	9 ms	12364 KB	Output is correct
59	Correct	8 ms	12108 KB	Output is correct
60	Correct	8 ms	12064 KB	Output is correct
61	Correct	122 ms	21508 KB	Output is correct
62	Correct	8 ms	12364 KB	Output is correct
63	Correct	155 ms	27860 KB	Output is correct
64	Correct	132 ms	21124 KB	Output is correct
65	Correct	17 ms	12364 KB	Output is correct
66	Correct	131 ms	21668 KB	Output is correct
67	Correct	9 ms	12364 KB	Output is correct
68	Correct	12 ms	12296 KB	Output is correct
69	Correct	83 ms	21300 KB	Output is correct
70	Correct	9 ms	12592 KB	Output is correct
71	Correct	195 ms	21056 KB	Output is correct
72	Correct	177 ms	22956 KB	Output is correct
73	Correct	8 ms	12108 KB	Output is correct
74	Correct	159 ms	28056 KB	Output is correct
75	Correct	138 ms	25504 KB	Output is correct
76	Correct	11 ms	12328 KB	Output is correct
77	Correct	12 ms	12332 KB	Output is correct
78	Correct	143 ms	21344 KB	Output is correct
79	Correct	84 ms	24724 KB	Output is correct
80	Correct	9 ms	12464 KB	Output is correct
81	Correct	10 ms	12408 KB	Output is correct
82	Correct	9 ms	12064 KB	Output is correct
83	Correct	8 ms	12108 KB	Output is correct
84	Correct	10 ms	12364 KB	Output is correct
85	Correct	155 ms	23808 KB	Output is correct
86	Correct	9 ms	12336 KB	Output is correct
87	Correct	177 ms	22828 KB	Output is correct
88	Correct	9 ms	12052 KB	Output is correct
89	Correct	113 ms	22304 KB	Output is correct
90	Correct	149 ms	23748 KB	Output is correct
91	Correct	153 ms	24604 KB	Output is correct
92	Correct	74 ms	21292 KB	Output is correct
93	Correct	9 ms	12468 KB	Output is correct
94	Correct	8 ms	12048 KB	Output is correct
95	Correct	94 ms	24660 KB	Output is correct
96	Correct	235 ms	37684 KB	Output is correct
97	Correct	9 ms	12464 KB	Output is correct
98	Correct	7 ms	12136 KB	Output is correct
99	Correct	87 ms	23880 KB	Output is correct
100	Correct	9 ms	12364 KB	Output is correct
101	Correct	153 ms	22768 KB	Output is correct
102	Correct	176 ms	34292 KB	Output is correct
103	Correct	13 ms	12444 KB	Output is correct
104	Correct	14 ms	12656 KB	Output is correct
105	Correct	12 ms	12332 KB	Output is correct
106	Correct	13 ms	12404 KB	Output is correct
107	Correct	10 ms	12364 KB	Output is correct
108	Correct	574 ms	72004 KB	Output is correct
109	Correct	921 ms	73572 KB	Output is correct
110	Correct	1022 ms	84612 KB	Output is correct
111	Correct	1270 ms	144572 KB	Output is correct
112	Correct	1022 ms	92444 KB	Output is correct
113	Correct	589 ms	76064 KB	Output is correct
114	Correct	841 ms	57960 KB	Output is correct
115	Correct	865 ms	57960 KB	Output is correct
116	Correct	955 ms	66440 KB	Output is correct
117	Correct	1028 ms	75816 KB	Output is correct
118	Correct	920 ms	62124 KB	Output is correct
119	Correct	1040 ms	75960 KB	Output is correct
120	Correct	1161 ms	128028 KB	Output is correct
121	Correct	944 ms	75860 KB	Output is correct
122	Correct	965 ms	72732 KB	Output is correct
123	Correct	635 ms	76832 KB	Output is correct
124	Correct	1217 ms	72576 KB	Output is correct

답안 #416568

Compilation message

Subtask #1 10.0 / 10.0

Subtask #2 24.0 / 24.0

Subtask #3 14.0 / 14.0

Subtask #4 22.0 / 22.0

Subtask #5 30.0 / 30.0

Subtask #1
10.0 / 10.0

Subtask #2
24.0 / 24.0

Subtask #3
14.0 / 14.0

Subtask #4
22.0 / 22.0

Subtask #5
30.0 / 30.0