답안 #102392

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
102392	2019-03-24T15:27:08 Z	Dat160601	Mergers (JOI19_mergers)	C++17	70 / 100	3000 ms	209416 KB

mergers

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define fi first
#define se second

const int N = 5e5 + 7;

int n, k, u, v, s[N], level[N], sub[N], par[20][N], cnt = 0, pset[N], ret[N], sz[N], deg[N], ans = 0;
bool vis[N], col[N];
vector <int> edge[N], tp[N], g[N], leaf;
map < pair <int, int>, int > ed;

int read(){
	char p;
	while((p = getchar())){
		if(p < '0' || p > '9') continue;
		break;
	}
	int ret = p - '0';
	while((p = getchar())){
		if(p >= '0' && p <= '9'){
			ret *= 10;
			ret += p - '0';
		}
		else break;
	}
	return ret;
}

void predfs(int u, int p){
	int ch = 0;
	for(int v : edge[u]){
		if(v == p) continue;
		deg[u]++;
		par[0][v] = u;
		level[v] = level[u] + 1;
		predfs(v, u);
		ch++;
	}
	if(ch == 0) leaf.pb(u);
}

int lca(int u, int v){
	if(level[u] > level[v]) swap(u, v);
	for(int i = 19; i >= 0; i--) if(level[par[i][v]] >= level[u]) v = par[i][v];
	for(int i = 19; i >= 0; i--) if(par[i][u] != par[i][v]) u = par[i][u], v = par[i][v];
	if(u == v) return u;
	return par[0][u];
}

int fset(int x){
	if(pset[x] == x) return x;
	return pset[x] = fset(pset[x]);
}

void unionset(int u, int v){
	u = fset(u), v = fset(v);
	if(u == v) return;
	pset[u] = v;
	sz[v] += sz[u];
	sz[u] = 0;
}

void dfs(int u, int p){
	int child = 0;
	for(int v : g[u]){
		if(v == p) continue;
		child ++;
		dfs(v, u);
	}
	if(child == 0 || (child == 1 && u == 1)) ans++;
}

int main(){
	n = read(), k = read();
	for(int i = 1; i < n; i++){
		u = read(), v = read();
		edge[u].pb(v);
		edge[v].pb(u);
	}
	for(int i = 1; i <= n; i++){
		s[i] = read();
		tp[s[i]].pb(i);
	}
	par[0][1] = 1;
	level[1] = 1;
	predfs(1, 1);
	for(int i = 1; i <= 19; i++){
		for(int j = 1; j <= n; j++){
			par[i][j] = par[i - 1][par[i - 1][j]];
		}
	}
	for(int i = 1; i <= k; i++){
		pset[i] = i;
		sz[i] = 1;
		if(tp[i].empty()) continue;
		int cur = tp[i][0];
		for(int j = 1; j < (int)tp[i].size(); j++){
			cur = lca(cur, tp[i][j]);
		}
		sub[cur]++;
	}
	queue <int> q;
	for(int x : leaf) q.push(x);
	while(!q.empty()){
		int u = q.front();
		q.pop();
		int p = fset(s[u]);
		sz[p] -= sub[u];
		deg[par[0][u]]--;
		if(!deg[par[0][u]]){
			q.push(par[0][u]);
		}
		if(sz[fset(p)] == 0) continue;
		unionset(p, s[par[0][u]]);
	}
	for(int i = 1; i <= k; i++){
		if(pset[i] == i) ret[i] = ++cnt;
	}
	for(int i = 1; i <= k; i++){
		if(pset[i] != i) ret[i] = ret[fset(i)];
	}
	for(int i = 1; i <= n; i++){
		int id = ret[s[i]];
		for(int j : edge[i]){
			int jd = ret[s[j]];
			if(id == jd) continue;
			if(ed[mp(id, jd)] > 0) continue;
			g[id].pb(jd);
			g[jd].pb(id);
			ed[mp(id, jd)]++;
			ed[mp(jd, id)]++;
		}
	}
	dfs(1, 1);
	if(ans == 1) printf("0");
	else printf("%d", (ans + 1) / 2);
}

Subtask #1
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	35840 KB	Output is correct
2	Correct	39 ms	35840 KB	Output is correct
3	Correct	33 ms	35840 KB	Output is correct
4	Correct	35 ms	35712 KB	Output is correct
5	Correct	33 ms	35704 KB	Output is correct
6	Correct	36 ms	35704 KB	Output is correct
7	Correct	32 ms	35712 KB	Output is correct
8	Correct	42 ms	35732 KB	Output is correct
9	Correct	35 ms	35840 KB	Output is correct
10	Correct	35 ms	35704 KB	Output is correct
11	Correct	35 ms	35712 KB	Output is correct
12	Correct	36 ms	35704 KB	Output is correct
13	Correct	33 ms	35784 KB	Output is correct
14	Correct	34 ms	35840 KB	Output is correct
15	Correct	35 ms	35704 KB	Output is correct
16	Correct	34 ms	35704 KB	Output is correct
17	Correct	33 ms	35712 KB	Output is correct
18	Correct	35 ms	35784 KB	Output is correct
19	Correct	37 ms	35812 KB	Output is correct
20	Correct	35 ms	35832 KB	Output is correct
21	Correct	36 ms	35704 KB	Output is correct
22	Correct	35 ms	35832 KB	Output is correct
23	Correct	35 ms	35704 KB	Output is correct
24	Correct	33 ms	35708 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	35840 KB	Output is correct
2	Correct	39 ms	35840 KB	Output is correct
3	Correct	33 ms	35840 KB	Output is correct
4	Correct	35 ms	35712 KB	Output is correct
5	Correct	33 ms	35704 KB	Output is correct
6	Correct	36 ms	35704 KB	Output is correct
7	Correct	32 ms	35712 KB	Output is correct
8	Correct	42 ms	35732 KB	Output is correct
9	Correct	35 ms	35840 KB	Output is correct
10	Correct	35 ms	35704 KB	Output is correct
11	Correct	35 ms	35712 KB	Output is correct
12	Correct	36 ms	35704 KB	Output is correct
13	Correct	33 ms	35784 KB	Output is correct
14	Correct	34 ms	35840 KB	Output is correct
15	Correct	35 ms	35704 KB	Output is correct
16	Correct	34 ms	35704 KB	Output is correct
17	Correct	33 ms	35712 KB	Output is correct
18	Correct	35 ms	35784 KB	Output is correct
19	Correct	37 ms	35812 KB	Output is correct
20	Correct	35 ms	35832 KB	Output is correct
21	Correct	36 ms	35704 KB	Output is correct
22	Correct	35 ms	35832 KB	Output is correct
23	Correct	35 ms	35704 KB	Output is correct
24	Correct	33 ms	35708 KB	Output is correct
25	Correct	36 ms	35712 KB	Output is correct
26	Correct	39 ms	36472 KB	Output is correct
27	Correct	36 ms	36224 KB	Output is correct
28	Correct	38 ms	36700 KB	Output is correct
29	Correct	41 ms	36728 KB	Output is correct
30	Correct	41 ms	36216 KB	Output is correct
31	Correct	38 ms	35836 KB	Output is correct
32	Correct	43 ms	36472 KB	Output is correct
33	Correct	34 ms	35832 KB	Output is correct
34	Correct	36 ms	36224 KB	Output is correct
35	Correct	46 ms	36856 KB	Output is correct
36	Correct	38 ms	36216 KB	Output is correct
37	Correct	38 ms	36480 KB	Output is correct
38	Correct	34 ms	35840 KB	Output is correct
39	Correct	37 ms	36224 KB	Output is correct
40	Correct	36 ms	36088 KB	Output is correct
41	Correct	36 ms	36216 KB	Output is correct
42	Correct	37 ms	36352 KB	Output is correct
43	Correct	38 ms	36364 KB	Output is correct
44	Correct	34 ms	35840 KB	Output is correct
45	Correct	35 ms	36344 KB	Output is correct
46	Correct	38 ms	36344 KB	Output is correct
47	Correct	37 ms	35732 KB	Output is correct
48	Correct	38 ms	36220 KB	Output is correct
49	Correct	41 ms	36736 KB	Output is correct
50	Correct	40 ms	36848 KB	Output is correct
51	Correct	39 ms	36216 KB	Output is correct
52	Correct	35 ms	36216 KB	Output is correct
53	Correct	37 ms	36344 KB	Output is correct
54	Correct	38 ms	36216 KB	Output is correct

Subtask #3
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	35840 KB	Output is correct
2	Correct	39 ms	35840 KB	Output is correct
3	Correct	33 ms	35840 KB	Output is correct
4	Correct	35 ms	35712 KB	Output is correct
5	Correct	33 ms	35704 KB	Output is correct
6	Correct	36 ms	35704 KB	Output is correct
7	Correct	32 ms	35712 KB	Output is correct
8	Correct	42 ms	35732 KB	Output is correct
9	Correct	35 ms	35840 KB	Output is correct
10	Correct	35 ms	35704 KB	Output is correct
11	Correct	35 ms	35712 KB	Output is correct
12	Correct	36 ms	35704 KB	Output is correct
13	Correct	33 ms	35784 KB	Output is correct
14	Correct	34 ms	35840 KB	Output is correct
15	Correct	35 ms	35704 KB	Output is correct
16	Correct	34 ms	35704 KB	Output is correct
17	Correct	33 ms	35712 KB	Output is correct
18	Correct	35 ms	35784 KB	Output is correct
19	Correct	37 ms	35812 KB	Output is correct
20	Correct	35 ms	35832 KB	Output is correct
21	Correct	36 ms	35704 KB	Output is correct
22	Correct	35 ms	35832 KB	Output is correct
23	Correct	35 ms	35704 KB	Output is correct
24	Correct	33 ms	35708 KB	Output is correct
25	Correct	34 ms	35820 KB	Output is correct
26	Correct	304 ms	49236 KB	Output is correct
27	Correct	317 ms	48960 KB	Output is correct
28	Correct	39 ms	36216 KB	Output is correct
29	Correct	32 ms	35712 KB	Output is correct
30	Correct	36 ms	35840 KB	Output is correct
31	Correct	266 ms	48996 KB	Output is correct
32	Correct	37 ms	36220 KB	Output is correct
33	Correct	156 ms	54264 KB	Output is correct
34	Correct	298 ms	48952 KB	Output is correct
35	Correct	38 ms	36224 KB	Output is correct
36	Correct	367 ms	49272 KB	Output is correct
37	Correct	39 ms	36088 KB	Output is correct
38	Correct	38 ms	36224 KB	Output is correct
39	Correct	327 ms	49140 KB	Output is correct
40	Correct	38 ms	36344 KB	Output is correct
41	Correct	155 ms	48880 KB	Output is correct
42	Correct	256 ms	50424 KB	Output is correct
43	Correct	40 ms	35840 KB	Output is correct
44	Correct	171 ms	54516 KB	Output is correct
45	Correct	193 ms	51844 KB	Output is correct
46	Correct	38 ms	36196 KB	Output is correct
47	Correct	46 ms	36212 KB	Output is correct

Subtask #4
22.0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	290 ms	49380 KB	Output is correct
2	Correct	489 ms	69076 KB	Output is correct
3	Correct	39 ms	36480 KB	Output is correct
4	Correct	38 ms	36192 KB	Output is correct
5	Correct	35 ms	35840 KB	Output is correct
6	Correct	35 ms	35712 KB	Output is correct
7	Correct	36 ms	36224 KB	Output is correct
8	Correct	477 ms	52468 KB	Output is correct
9	Correct	40 ms	36216 KB	Output is correct
10	Correct	401 ms	49376 KB	Output is correct
11	Correct	34 ms	35840 KB	Output is correct
12	Correct	390 ms	49116 KB	Output is correct
13	Correct	493 ms	53852 KB	Output is correct
14	Correct	564 ms	68724 KB	Output is correct
15	Correct	325 ms	49124 KB	Output is correct
16	Correct	37 ms	36352 KB	Output is correct
17	Correct	36 ms	35832 KB	Output is correct
18	Correct	433 ms	65640 KB	Output is correct
19	Correct	575 ms	72696 KB	Output is correct
20	Correct	36 ms	36352 KB	Output is correct
21	Correct	32 ms	35704 KB	Output is correct
22	Correct	363 ms	53792 KB	Output is correct
23	Correct	46 ms	36216 KB	Output is correct
24	Correct	427 ms	50860 KB	Output is correct
25	Correct	468 ms	70516 KB	Output is correct
26	Correct	39 ms	36824 KB	Output is correct
27	Correct	41 ms	36744 KB	Output is correct
28	Correct	40 ms	36188 KB	Output is correct
29	Correct	35 ms	36216 KB	Output is correct
30	Correct	40 ms	36476 KB	Output is correct

Subtask #5
0 / 30.0

#	결과	실행 시간	메모리	Grader output
1	Correct	34 ms	35840 KB	Output is correct
2	Correct	39 ms	35840 KB	Output is correct
3	Correct	33 ms	35840 KB	Output is correct
4	Correct	35 ms	35712 KB	Output is correct
5	Correct	33 ms	35704 KB	Output is correct
6	Correct	36 ms	35704 KB	Output is correct
7	Correct	32 ms	35712 KB	Output is correct
8	Correct	42 ms	35732 KB	Output is correct
9	Correct	35 ms	35840 KB	Output is correct
10	Correct	35 ms	35704 KB	Output is correct
11	Correct	35 ms	35712 KB	Output is correct
12	Correct	36 ms	35704 KB	Output is correct
13	Correct	33 ms	35784 KB	Output is correct
14	Correct	34 ms	35840 KB	Output is correct
15	Correct	35 ms	35704 KB	Output is correct
16	Correct	34 ms	35704 KB	Output is correct
17	Correct	33 ms	35712 KB	Output is correct
18	Correct	35 ms	35784 KB	Output is correct
19	Correct	37 ms	35812 KB	Output is correct
20	Correct	35 ms	35832 KB	Output is correct
21	Correct	36 ms	35704 KB	Output is correct
22	Correct	35 ms	35832 KB	Output is correct
23	Correct	35 ms	35704 KB	Output is correct
24	Correct	33 ms	35708 KB	Output is correct
25	Correct	36 ms	35712 KB	Output is correct
26	Correct	39 ms	36472 KB	Output is correct
27	Correct	36 ms	36224 KB	Output is correct
28	Correct	38 ms	36700 KB	Output is correct
29	Correct	41 ms	36728 KB	Output is correct
30	Correct	41 ms	36216 KB	Output is correct
31	Correct	38 ms	35836 KB	Output is correct
32	Correct	43 ms	36472 KB	Output is correct
33	Correct	34 ms	35832 KB	Output is correct
34	Correct	36 ms	36224 KB	Output is correct
35	Correct	46 ms	36856 KB	Output is correct
36	Correct	38 ms	36216 KB	Output is correct
37	Correct	38 ms	36480 KB	Output is correct
38	Correct	34 ms	35840 KB	Output is correct
39	Correct	37 ms	36224 KB	Output is correct
40	Correct	36 ms	36088 KB	Output is correct
41	Correct	36 ms	36216 KB	Output is correct
42	Correct	37 ms	36352 KB	Output is correct
43	Correct	38 ms	36364 KB	Output is correct
44	Correct	34 ms	35840 KB	Output is correct
45	Correct	35 ms	36344 KB	Output is correct
46	Correct	38 ms	36344 KB	Output is correct
47	Correct	37 ms	35732 KB	Output is correct
48	Correct	38 ms	36220 KB	Output is correct
49	Correct	41 ms	36736 KB	Output is correct
50	Correct	40 ms	36848 KB	Output is correct
51	Correct	39 ms	36216 KB	Output is correct
52	Correct	35 ms	36216 KB	Output is correct
53	Correct	37 ms	36344 KB	Output is correct
54	Correct	38 ms	36216 KB	Output is correct
55	Correct	34 ms	35820 KB	Output is correct
56	Correct	304 ms	49236 KB	Output is correct
57	Correct	317 ms	48960 KB	Output is correct
58	Correct	39 ms	36216 KB	Output is correct
59	Correct	32 ms	35712 KB	Output is correct
60	Correct	36 ms	35840 KB	Output is correct
61	Correct	266 ms	48996 KB	Output is correct
62	Correct	37 ms	36220 KB	Output is correct
63	Correct	156 ms	54264 KB	Output is correct
64	Correct	298 ms	48952 KB	Output is correct
65	Correct	38 ms	36224 KB	Output is correct
66	Correct	367 ms	49272 KB	Output is correct
67	Correct	39 ms	36088 KB	Output is correct
68	Correct	38 ms	36224 KB	Output is correct
69	Correct	327 ms	49140 KB	Output is correct
70	Correct	38 ms	36344 KB	Output is correct
71	Correct	155 ms	48880 KB	Output is correct
72	Correct	256 ms	50424 KB	Output is correct
73	Correct	40 ms	35840 KB	Output is correct
74	Correct	171 ms	54516 KB	Output is correct
75	Correct	193 ms	51844 KB	Output is correct
76	Correct	38 ms	36196 KB	Output is correct
77	Correct	46 ms	36212 KB	Output is correct
78	Correct	290 ms	49380 KB	Output is correct
79	Correct	489 ms	69076 KB	Output is correct
80	Correct	39 ms	36480 KB	Output is correct
81	Correct	38 ms	36192 KB	Output is correct
82	Correct	35 ms	35840 KB	Output is correct
83	Correct	35 ms	35712 KB	Output is correct
84	Correct	36 ms	36224 KB	Output is correct
85	Correct	477 ms	52468 KB	Output is correct
86	Correct	40 ms	36216 KB	Output is correct
87	Correct	401 ms	49376 KB	Output is correct
88	Correct	34 ms	35840 KB	Output is correct
89	Correct	390 ms	49116 KB	Output is correct
90	Correct	493 ms	53852 KB	Output is correct
91	Correct	564 ms	68724 KB	Output is correct
92	Correct	325 ms	49124 KB	Output is correct
93	Correct	37 ms	36352 KB	Output is correct
94	Correct	36 ms	35832 KB	Output is correct
95	Correct	433 ms	65640 KB	Output is correct
96	Correct	575 ms	72696 KB	Output is correct
97	Correct	36 ms	36352 KB	Output is correct
98	Correct	32 ms	35704 KB	Output is correct
99	Correct	363 ms	53792 KB	Output is correct
100	Correct	46 ms	36216 KB	Output is correct
101	Correct	427 ms	50860 KB	Output is correct
102	Correct	468 ms	70516 KB	Output is correct
103	Correct	39 ms	36824 KB	Output is correct
104	Correct	41 ms	36744 KB	Output is correct
105	Correct	40 ms	36188 KB	Output is correct
106	Correct	35 ms	36216 KB	Output is correct
107	Correct	40 ms	36476 KB	Output is correct
108	Correct	2380 ms	116488 KB	Output is correct
109	Correct	1372 ms	113304 KB	Output is correct
110	Correct	836 ms	122376 KB	Output is correct
111	Execution timed out	3040 ms	209416 KB	Time limit exceeded
112	Halted	0 ms	0 KB	-

답안 #102392

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 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
0 / 30.0