답안 #104752

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
104752	2019-04-09T06:07:13 Z	Just_Solve_The_Problem	Mergers (JOI19_mergers)	C++11	100 / 100	2298 ms	155000 KB

mergers

#include <bits/stdc++.h>

using namespace std;

const int N = (int)5e5 + 7;

struct DSU {
	int par[N];
	int siz[N];
	DSU() {
		iota(par, par + N, 0);
		fill(siz, siz + N, 1);
	}
	int getpar(int a) {
		if (par[a] == a) return a;
		return par[a] = getpar(par[a]);
	}
	void connect(int a, int b) {
		a = getpar(a);
		b = getpar(b);
		if (a != b) {
			if (siz[a] > siz[b]) swap(a, b);
			par[a] = b;
			siz[b] += siz[a];
		}
	}
};
DSU dsu;

int n, k;
vector < int > gr[N];
int st[N], s[N], sb[N], prs[N];
int deg[N], tin[N], tout[N];
int lc[20][N];
int tiktak;
vector < int > vec[N];

bool upper(int a, int b) {
	return tin[a] <= tin[b] && tout[a] >= tout[b];
}

int lca(int a, int b) {
	if (upper(a, b)) return a;
	if (upper(b, a)) return b;
	for (int i = 19; i >= 0; i--) {
		if (!upper(lc[i][a], b)) a = lc[i][a];
	}
	return lc[0][a];
}

void precalc(int v, int pr) {
	tin[v] = ++tiktak;
	lc[0][v] = pr;
	for (int i = 1; i < 20; i++) {
		lc[i][v] = lc[i - 1][lc[i - 1][v]];
	}
	for (int to : gr[v]) {
		if (to == pr) continue;
		precalc(to, v);
	}
	tout[v] = tiktak;
}

void dfs(int v, int pr) {
	sb[prs[s[v]]]++;
	for (int to : gr[v]) {
		if (to == pr) continue;
		dfs(to, v);
		st[v] += (st[to] - sb[to]);
		if (st[to] - sb[to] > 0) {
			dsu.connect(v, to);
		}
	}
	st[v]++;
}

main() {
	scanf("%d %d", &n, &k);
	for (int i = 1; i < n; i++) {
		int u, v;
		scanf("%d %d", &u, &v);
		gr[u].push_back(v);
		gr[v].push_back(u);
	}
	for (int i = 1; i <= n; i++) {
		scanf("%d", &s[i]);
		vec[s[i]].push_back(i);
	}
	precalc(1, 1);
	for (int i = 1; i <= k; i++) {
		int v = vec[i][0];
		for (int j = 1; j < vec[i].size(); j++) {
			v = lca(v, vec[i][j]);
		}
		prs[i] = v;
	}
	dfs(1, 1);
	for (int i = 1; i <= n; i++) {
		for (int to : gr[i]) {
			if (dsu.getpar(i) != dsu.getpar(to)) {
				deg[dsu.getpar(i)]++;
			}
		}
	}
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		ans += (deg[i] == 1);
	}
	cout << (ans + 1) / 2;
}

Compilation message

mergers.cpp:77:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
mergers.cpp: In function 'int main()':
mergers.cpp:92:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 1; j < vec[i].size(); j++) {
                   ~~^~~~~~~~~~~~~~~
mergers.cpp:78:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &k);
  ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:81:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &u, &v);
   ~~~~~^~~~~~~~~~~~~~~~~
mergers.cpp:86:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &s[i]);
   ~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	30 ms	27904 KB	Output is correct
2	Correct	30 ms	27904 KB	Output is correct
3	Correct	27 ms	27896 KB	Output is correct
4	Correct	27 ms	27904 KB	Output is correct
5	Correct	27 ms	27904 KB	Output is correct
6	Correct	28 ms	27896 KB	Output is correct
7	Correct	32 ms	27904 KB	Output is correct
8	Correct	28 ms	27896 KB	Output is correct
9	Correct	28 ms	27896 KB	Output is correct
10	Correct	27 ms	27904 KB	Output is correct
11	Correct	27 ms	27904 KB	Output is correct
12	Correct	28 ms	27904 KB	Output is correct
13	Correct	30 ms	27852 KB	Output is correct
14	Correct	28 ms	27904 KB	Output is correct
15	Correct	27 ms	27904 KB	Output is correct
16	Correct	27 ms	27896 KB	Output is correct
17	Correct	27 ms	27896 KB	Output is correct
18	Correct	26 ms	27904 KB	Output is correct
19	Correct	30 ms	27904 KB	Output is correct
20	Correct	26 ms	27860 KB	Output is correct
21	Correct	27 ms	27904 KB	Output is correct
22	Correct	27 ms	27904 KB	Output is correct
23	Correct	27 ms	27904 KB	Output is correct
24	Correct	31 ms	27904 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	30 ms	27904 KB	Output is correct
2	Correct	30 ms	27904 KB	Output is correct
3	Correct	27 ms	27896 KB	Output is correct
4	Correct	27 ms	27904 KB	Output is correct
5	Correct	27 ms	27904 KB	Output is correct
6	Correct	28 ms	27896 KB	Output is correct
7	Correct	32 ms	27904 KB	Output is correct
8	Correct	28 ms	27896 KB	Output is correct
9	Correct	28 ms	27896 KB	Output is correct
10	Correct	27 ms	27904 KB	Output is correct
11	Correct	27 ms	27904 KB	Output is correct
12	Correct	28 ms	27904 KB	Output is correct
13	Correct	30 ms	27852 KB	Output is correct
14	Correct	28 ms	27904 KB	Output is correct
15	Correct	27 ms	27904 KB	Output is correct
16	Correct	27 ms	27896 KB	Output is correct
17	Correct	27 ms	27896 KB	Output is correct
18	Correct	26 ms	27904 KB	Output is correct
19	Correct	30 ms	27904 KB	Output is correct
20	Correct	26 ms	27860 KB	Output is correct
21	Correct	27 ms	27904 KB	Output is correct
22	Correct	27 ms	27904 KB	Output is correct
23	Correct	27 ms	27904 KB	Output is correct
24	Correct	31 ms	27904 KB	Output is correct
25	Correct	26 ms	27896 KB	Output is correct
26	Correct	30 ms	28416 KB	Output is correct
27	Correct	31 ms	28408 KB	Output is correct
28	Correct	36 ms	28664 KB	Output is correct
29	Correct	32 ms	28536 KB	Output is correct
30	Correct	28 ms	28416 KB	Output is correct
31	Correct	29 ms	27904 KB	Output is correct
32	Correct	30 ms	28672 KB	Output is correct
33	Correct	30 ms	27904 KB	Output is correct
34	Correct	30 ms	28416 KB	Output is correct
35	Correct	32 ms	28408 KB	Output is correct
36	Correct	30 ms	28416 KB	Output is correct
37	Correct	33 ms	28352 KB	Output is correct
38	Correct	27 ms	27896 KB	Output is correct
39	Correct	37 ms	28408 KB	Output is correct
40	Correct	29 ms	28272 KB	Output is correct
41	Correct	33 ms	28416 KB	Output is correct
42	Correct	30 ms	28504 KB	Output is correct
43	Correct	31 ms	28664 KB	Output is correct
44	Correct	28 ms	28024 KB	Output is correct
45	Correct	33 ms	28536 KB	Output is correct
46	Correct	33 ms	28416 KB	Output is correct
47	Correct	35 ms	27896 KB	Output is correct
48	Correct	33 ms	28416 KB	Output is correct
49	Correct	33 ms	28536 KB	Output is correct
50	Correct	34 ms	28664 KB	Output is correct
51	Correct	34 ms	28408 KB	Output is correct
52	Correct	32 ms	28416 KB	Output is correct
53	Correct	31 ms	28412 KB	Output is correct
54	Correct	37 ms	28288 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	30 ms	27904 KB	Output is correct
2	Correct	30 ms	27904 KB	Output is correct
3	Correct	27 ms	27896 KB	Output is correct
4	Correct	27 ms	27904 KB	Output is correct
5	Correct	27 ms	27904 KB	Output is correct
6	Correct	28 ms	27896 KB	Output is correct
7	Correct	32 ms	27904 KB	Output is correct
8	Correct	28 ms	27896 KB	Output is correct
9	Correct	28 ms	27896 KB	Output is correct
10	Correct	27 ms	27904 KB	Output is correct
11	Correct	27 ms	27904 KB	Output is correct
12	Correct	28 ms	27904 KB	Output is correct
13	Correct	30 ms	27852 KB	Output is correct
14	Correct	28 ms	27904 KB	Output is correct
15	Correct	27 ms	27904 KB	Output is correct
16	Correct	27 ms	27896 KB	Output is correct
17	Correct	27 ms	27896 KB	Output is correct
18	Correct	26 ms	27904 KB	Output is correct
19	Correct	30 ms	27904 KB	Output is correct
20	Correct	26 ms	27860 KB	Output is correct
21	Correct	27 ms	27904 KB	Output is correct
22	Correct	27 ms	27904 KB	Output is correct
23	Correct	27 ms	27904 KB	Output is correct
24	Correct	31 ms	27904 KB	Output is correct
25	Correct	27 ms	27904 KB	Output is correct
26	Correct	176 ms	42964 KB	Output is correct
27	Correct	258 ms	42484 KB	Output is correct
28	Correct	33 ms	28408 KB	Output is correct
29	Correct	31 ms	28012 KB	Output is correct
30	Correct	30 ms	27980 KB	Output is correct
31	Correct	244 ms	42876 KB	Output is correct
32	Correct	28 ms	28280 KB	Output is correct
33	Correct	227 ms	52444 KB	Output is correct
34	Correct	241 ms	42516 KB	Output is correct
35	Correct	33 ms	28408 KB	Output is correct
36	Correct	267 ms	43920 KB	Output is correct
37	Correct	37 ms	28416 KB	Output is correct
38	Correct	31 ms	28380 KB	Output is correct
39	Correct	181 ms	42864 KB	Output is correct
40	Correct	39 ms	28672 KB	Output is correct
41	Correct	248 ms	42356 KB	Output is correct
42	Correct	250 ms	45916 KB	Output is correct
43	Correct	29 ms	27896 KB	Output is correct
44	Correct	269 ms	52852 KB	Output is correct
45	Correct	274 ms	47736 KB	Output is correct
46	Correct	31 ms	28408 KB	Output is correct
47	Correct	32 ms	28416 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	164 ms	41328 KB	Output is correct
2	Correct	244 ms	45124 KB	Output is correct
3	Correct	33 ms	28536 KB	Output is correct
4	Correct	31 ms	28408 KB	Output is correct
5	Correct	26 ms	27896 KB	Output is correct
6	Correct	29 ms	27900 KB	Output is correct
7	Correct	32 ms	28416 KB	Output is correct
8	Correct	296 ms	44792 KB	Output is correct
9	Correct	34 ms	28416 KB	Output is correct
10	Correct	238 ms	43512 KB	Output is correct
11	Correct	27 ms	27904 KB	Output is correct
12	Correct	231 ms	43392 KB	Output is correct
13	Correct	301 ms	44788 KB	Output is correct
14	Correct	247 ms	46584 KB	Output is correct
15	Correct	169 ms	42708 KB	Output is correct
16	Correct	29 ms	28408 KB	Output is correct
17	Correct	27 ms	27980 KB	Output is correct
18	Correct	252 ms	46680 KB	Output is correct
19	Correct	252 ms	52088 KB	Output is correct
20	Correct	28 ms	28408 KB	Output is correct
21	Correct	30 ms	28032 KB	Output is correct
22	Correct	253 ms	45028 KB	Output is correct
23	Correct	30 ms	28412 KB	Output is correct
24	Correct	226 ms	43768 KB	Output is correct
25	Correct	266 ms	50168 KB	Output is correct
26	Correct	30 ms	28536 KB	Output is correct
27	Correct	34 ms	28536 KB	Output is correct
28	Correct	34 ms	28484 KB	Output is correct
29	Correct	28 ms	28408 KB	Output is correct
30	Correct	35 ms	28408 KB	Output is correct

Subtask #5
30.0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	30 ms	27904 KB	Output is correct
2	Correct	30 ms	27904 KB	Output is correct
3	Correct	27 ms	27896 KB	Output is correct
4	Correct	27 ms	27904 KB	Output is correct
5	Correct	27 ms	27904 KB	Output is correct
6	Correct	28 ms	27896 KB	Output is correct
7	Correct	32 ms	27904 KB	Output is correct
8	Correct	28 ms	27896 KB	Output is correct
9	Correct	28 ms	27896 KB	Output is correct
10	Correct	27 ms	27904 KB	Output is correct
11	Correct	27 ms	27904 KB	Output is correct
12	Correct	28 ms	27904 KB	Output is correct
13	Correct	30 ms	27852 KB	Output is correct
14	Correct	28 ms	27904 KB	Output is correct
15	Correct	27 ms	27904 KB	Output is correct
16	Correct	27 ms	27896 KB	Output is correct
17	Correct	27 ms	27896 KB	Output is correct
18	Correct	26 ms	27904 KB	Output is correct
19	Correct	30 ms	27904 KB	Output is correct
20	Correct	26 ms	27860 KB	Output is correct
21	Correct	27 ms	27904 KB	Output is correct
22	Correct	27 ms	27904 KB	Output is correct
23	Correct	27 ms	27904 KB	Output is correct
24	Correct	31 ms	27904 KB	Output is correct
25	Correct	26 ms	27896 KB	Output is correct
26	Correct	30 ms	28416 KB	Output is correct
27	Correct	31 ms	28408 KB	Output is correct
28	Correct	36 ms	28664 KB	Output is correct
29	Correct	32 ms	28536 KB	Output is correct
30	Correct	28 ms	28416 KB	Output is correct
31	Correct	29 ms	27904 KB	Output is correct
32	Correct	30 ms	28672 KB	Output is correct
33	Correct	30 ms	27904 KB	Output is correct
34	Correct	30 ms	28416 KB	Output is correct
35	Correct	32 ms	28408 KB	Output is correct
36	Correct	30 ms	28416 KB	Output is correct
37	Correct	33 ms	28352 KB	Output is correct
38	Correct	27 ms	27896 KB	Output is correct
39	Correct	37 ms	28408 KB	Output is correct
40	Correct	29 ms	28272 KB	Output is correct
41	Correct	33 ms	28416 KB	Output is correct
42	Correct	30 ms	28504 KB	Output is correct
43	Correct	31 ms	28664 KB	Output is correct
44	Correct	28 ms	28024 KB	Output is correct
45	Correct	33 ms	28536 KB	Output is correct
46	Correct	33 ms	28416 KB	Output is correct
47	Correct	35 ms	27896 KB	Output is correct
48	Correct	33 ms	28416 KB	Output is correct
49	Correct	33 ms	28536 KB	Output is correct
50	Correct	34 ms	28664 KB	Output is correct
51	Correct	34 ms	28408 KB	Output is correct
52	Correct	32 ms	28416 KB	Output is correct
53	Correct	31 ms	28412 KB	Output is correct
54	Correct	37 ms	28288 KB	Output is correct
55	Correct	27 ms	27904 KB	Output is correct
56	Correct	176 ms	42964 KB	Output is correct
57	Correct	258 ms	42484 KB	Output is correct
58	Correct	33 ms	28408 KB	Output is correct
59	Correct	31 ms	28012 KB	Output is correct
60	Correct	30 ms	27980 KB	Output is correct
61	Correct	244 ms	42876 KB	Output is correct
62	Correct	28 ms	28280 KB	Output is correct
63	Correct	227 ms	52444 KB	Output is correct
64	Correct	241 ms	42516 KB	Output is correct
65	Correct	33 ms	28408 KB	Output is correct
66	Correct	267 ms	43920 KB	Output is correct
67	Correct	37 ms	28416 KB	Output is correct
68	Correct	31 ms	28380 KB	Output is correct
69	Correct	181 ms	42864 KB	Output is correct
70	Correct	39 ms	28672 KB	Output is correct
71	Correct	248 ms	42356 KB	Output is correct
72	Correct	250 ms	45916 KB	Output is correct
73	Correct	29 ms	27896 KB	Output is correct
74	Correct	269 ms	52852 KB	Output is correct
75	Correct	274 ms	47736 KB	Output is correct
76	Correct	31 ms	28408 KB	Output is correct
77	Correct	32 ms	28416 KB	Output is correct
78	Correct	164 ms	41328 KB	Output is correct
79	Correct	244 ms	45124 KB	Output is correct
80	Correct	33 ms	28536 KB	Output is correct
81	Correct	31 ms	28408 KB	Output is correct
82	Correct	26 ms	27896 KB	Output is correct
83	Correct	29 ms	27900 KB	Output is correct
84	Correct	32 ms	28416 KB	Output is correct
85	Correct	296 ms	44792 KB	Output is correct
86	Correct	34 ms	28416 KB	Output is correct
87	Correct	238 ms	43512 KB	Output is correct
88	Correct	27 ms	27904 KB	Output is correct
89	Correct	231 ms	43392 KB	Output is correct
90	Correct	301 ms	44788 KB	Output is correct
91	Correct	247 ms	46584 KB	Output is correct
92	Correct	169 ms	42708 KB	Output is correct
93	Correct	29 ms	28408 KB	Output is correct
94	Correct	27 ms	27980 KB	Output is correct
95	Correct	252 ms	46680 KB	Output is correct
96	Correct	252 ms	52088 KB	Output is correct
97	Correct	28 ms	28408 KB	Output is correct
98	Correct	30 ms	28032 KB	Output is correct
99	Correct	253 ms	45028 KB	Output is correct
100	Correct	30 ms	28412 KB	Output is correct
101	Correct	226 ms	43768 KB	Output is correct
102	Correct	266 ms	50168 KB	Output is correct
103	Correct	30 ms	28536 KB	Output is correct
104	Correct	34 ms	28536 KB	Output is correct
105	Correct	34 ms	28484 KB	Output is correct
106	Correct	28 ms	28408 KB	Output is correct
107	Correct	35 ms	28408 KB	Output is correct
108	Correct	1844 ms	113488 KB	Output is correct
109	Correct	1765 ms	126160 KB	Output is correct
110	Correct	1894 ms	141928 KB	Output is correct
111	Correct	2088 ms	155000 KB	Output is correct
112	Correct	2167 ms	141248 KB	Output is correct
113	Correct	1569 ms	122336 KB	Output is correct
114	Correct	1425 ms	100960 KB	Output is correct
115	Correct	1436 ms	100712 KB	Output is correct
116	Correct	2059 ms	109464 KB	Output is correct
117	Correct	1594 ms	122392 KB	Output is correct
118	Correct	1400 ms	104312 KB	Output is correct
119	Correct	1621 ms	122360 KB	Output is correct
120	Correct	2106 ms	142396 KB	Output is correct
121	Correct	1827 ms	122488 KB	Output is correct
122	Correct	2298 ms	115332 KB	Output is correct
123	Correct	1430 ms	124192 KB	Output is correct
124	Correct	1903 ms	120852 KB	Output is correct

답안 #104752

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