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답안 #102402

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
102402 2019-03-24T16:38:40 Z Dat160601 Mergers (JOI19_mergers) C++17
100 / 100
 2987 ms 204916 KB 
#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], now[N], ans = 0;
bool vis[N], col[N];
vector <int> edge[N], tp[N], g[N], leaf;
unordered_map < long long, 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;
	if(now[u] <= now[v]){
		pset[u] = v;
		sz[v] += sz[u];
		sz[u] = 0;
		now[v] += now[u];
		now[u] = 0;
	}
	else{
		pset[v] = u;
		sz[u] += sz[v];
		sz[v] = 0;
		now[u] += now[v];
		now[v] = 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++){
		now[i] = 1;
		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[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[1LL * id * N + jd] > 0) continue;
			g[id].pb(jd);
			g[jd].pb(id);
			ed[1LL * id * N + jd]++;
			ed[1LL * jd * N + 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 35 ms 35704 KB Output is correct
2 Correct 35 ms 35832 KB Output is correct
3 Correct 36 ms 35832 KB Output is correct
4 Correct 36 ms 35832 KB Output is correct
5 Correct 35 ms 35704 KB Output is correct
6 Correct 35 ms 35840 KB Output is correct
7 Correct 35 ms 35704 KB Output is correct
8 Correct 33 ms 35832 KB Output is correct
9 Correct 34 ms 35712 KB Output is correct
10 Correct 36 ms 35840 KB Output is correct
11 Correct 37 ms 35832 KB Output is correct
12 Correct 38 ms 35832 KB Output is correct
13 Correct 35 ms 35840 KB Output is correct
14 Correct 35 ms 35812 KB Output is correct
15 Correct 35 ms 35832 KB Output is correct
16 Correct 34 ms 35728 KB Output is correct
17 Correct 36 ms 35828 KB Output is correct
18 Correct 42 ms 35832 KB Output is correct
19 Correct 34 ms 35840 KB Output is correct
20 Correct 38 ms 35712 KB Output is correct
21 Correct 35 ms 35960 KB Output is correct
22 Correct 36 ms 35840 KB Output is correct
23 Correct 36 ms 35840 KB Output is correct
24 Correct 37 ms 35704 KB Output is correct

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 35704 KB Output is correct
2 Correct 35 ms 35832 KB Output is correct
3 Correct 36 ms 35832 KB Output is correct
4 Correct 36 ms 35832 KB Output is correct
5 Correct 35 ms 35704 KB Output is correct
6 Correct 35 ms 35840 KB Output is correct
7 Correct 35 ms 35704 KB Output is correct
8 Correct 33 ms 35832 KB Output is correct
9 Correct 34 ms 35712 KB Output is correct
10 Correct 36 ms 35840 KB Output is correct
11 Correct 37 ms 35832 KB Output is correct
12 Correct 38 ms 35832 KB Output is correct
13 Correct 35 ms 35840 KB Output is correct
14 Correct 35 ms 35812 KB Output is correct
15 Correct 35 ms 35832 KB Output is correct
16 Correct 34 ms 35728 KB Output is correct
17 Correct 36 ms 35828 KB Output is correct
18 Correct 42 ms 35832 KB Output is correct
19 Correct 34 ms 35840 KB Output is correct
20 Correct 38 ms 35712 KB Output is correct
21 Correct 35 ms 35960 KB Output is correct
22 Correct 36 ms 35840 KB Output is correct
23 Correct 36 ms 35840 KB Output is correct
24 Correct 37 ms 35704 KB Output is correct
25 Correct 37 ms 35816 KB Output is correct
26 Correct 38 ms 36472 KB Output is correct
27 Correct 39 ms 36252 KB Output is correct
28 Correct 39 ms 36600 KB Output is correct
29 Correct 37 ms 36608 KB Output is correct
30 Correct 36 ms 36216 KB Output is correct
31 Correct 37 ms 35840 KB Output is correct
32 Correct 39 ms 36480 KB Output is correct
33 Correct 35 ms 35712 KB Output is correct
34 Correct 34 ms 36224 KB Output is correct
35 Correct 45 ms 36600 KB Output is correct
36 Correct 37 ms 36140 KB Output is correct
37 Correct 41 ms 36224 KB Output is correct
38 Correct 36 ms 35832 KB Output is correct
39 Correct 38 ms 36216 KB Output is correct
40 Correct 42 ms 36216 KB Output is correct
41 Correct 42 ms 36216 KB Output is correct
42 Correct 37 ms 36344 KB Output is correct
43 Correct 38 ms 36348 KB Output is correct
44 Correct 37 ms 35832 KB Output is correct
45 Correct 38 ms 36352 KB Output is correct
46 Correct 39 ms 36352 KB Output is correct
47 Correct 34 ms 35840 KB Output is correct
48 Correct 40 ms 36188 KB Output is correct
49 Correct 37 ms 36600 KB Output is correct
50 Correct 38 ms 36728 KB Output is correct
51 Correct 36 ms 36216 KB Output is correct
52 Correct 35 ms 36216 KB Output is correct
53 Correct 39 ms 36352 KB Output is correct
54 Correct 40 ms 36220 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 35704 KB Output is correct
2 Correct 35 ms 35832 KB Output is correct
3 Correct 36 ms 35832 KB Output is correct
4 Correct 36 ms 35832 KB Output is correct
5 Correct 35 ms 35704 KB Output is correct
6 Correct 35 ms 35840 KB Output is correct
7 Correct 35 ms 35704 KB Output is correct
8 Correct 33 ms 35832 KB Output is correct
9 Correct 34 ms 35712 KB Output is correct
10 Correct 36 ms 35840 KB Output is correct
11 Correct 37 ms 35832 KB Output is correct
12 Correct 38 ms 35832 KB Output is correct
13 Correct 35 ms 35840 KB Output is correct
14 Correct 35 ms 35812 KB Output is correct
15 Correct 35 ms 35832 KB Output is correct
16 Correct 34 ms 35728 KB Output is correct
17 Correct 36 ms 35828 KB Output is correct
18 Correct 42 ms 35832 KB Output is correct
19 Correct 34 ms 35840 KB Output is correct
20 Correct 38 ms 35712 KB Output is correct
21 Correct 35 ms 35960 KB Output is correct
22 Correct 36 ms 35840 KB Output is correct
23 Correct 36 ms 35840 KB Output is correct
24 Correct 37 ms 35704 KB Output is correct
25 Correct 35 ms 35744 KB Output is correct
26 Correct 308 ms 49184 KB Output is correct
27 Correct 290 ms 48884 KB Output is correct
28 Correct 37 ms 36224 KB Output is correct
29 Correct 34 ms 35832 KB Output is correct
30 Correct 34 ms 35840 KB Output is correct
31 Correct 281 ms 49024 KB Output is correct
32 Correct 44 ms 36216 KB Output is correct
33 Correct 157 ms 54220 KB Output is correct
34 Correct 316 ms 49048 KB Output is correct
35 Correct 39 ms 36216 KB Output is correct
36 Correct 345 ms 49244 KB Output is correct
37 Correct 34 ms 36216 KB Output is correct
38 Correct 36 ms 36216 KB Output is correct
39 Correct 272 ms 49120 KB Output is correct
40 Correct 42 ms 36344 KB Output is correct
41 Correct 114 ms 48884 KB Output is correct
42 Correct 205 ms 50296 KB Output is correct
43 Correct 36 ms 35832 KB Output is correct
44 Correct 152 ms 54516 KB Output is correct
45 Correct 138 ms 51848 KB Output is correct
46 Correct 37 ms 36216 KB Output is correct
47 Correct 36 ms 36260 KB Output is correct

Subtask #4
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 274 ms 49188 KB Output is correct
2 Correct 334 ms 64988 KB Output is correct
3 Correct 47 ms 36472 KB Output is correct
4 Correct 43 ms 36220 KB Output is correct
5 Correct 36 ms 35832 KB Output is correct
6 Correct 41 ms 35960 KB Output is correct
7 Correct 37 ms 36216 KB Output is correct
8 Correct 475 ms 52196 KB Output is correct
9 Correct 36 ms 36216 KB Output is correct
10 Correct 317 ms 49360 KB Output is correct
11 Correct 40 ms 35832 KB Output is correct
12 Correct 405 ms 49144 KB Output is correct
13 Correct 486 ms 53288 KB Output is correct
14 Correct 439 ms 64568 KB Output is correct
15 Correct 343 ms 49148 KB Output is correct
16 Correct 39 ms 36344 KB Output is correct
17 Correct 43 ms 35832 KB Output is correct
18 Correct 374 ms 62700 KB Output is correct
19 Correct 463 ms 68380 KB Output is correct
20 Correct 37 ms 36344 KB Output is correct
21 Correct 35 ms 35832 KB Output is correct
22 Correct 373 ms 53360 KB Output is correct
23 Correct 38 ms 36216 KB Output is correct
24 Correct 441 ms 50452 KB Output is correct
25 Correct 396 ms 66556 KB Output is correct
26 Correct 37 ms 36608 KB Output is correct
27 Correct 37 ms 36600 KB Output is correct
28 Correct 39 ms 36232 KB Output is correct
29 Correct 36 ms 36224 KB Output is correct
30 Correct 48 ms 36344 KB Output is correct

Subtask #5
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 35 ms 35704 KB Output is correct
2 Correct 35 ms 35832 KB Output is correct
3 Correct 36 ms 35832 KB Output is correct
4 Correct 36 ms 35832 KB Output is correct
5 Correct 35 ms 35704 KB Output is correct
6 Correct 35 ms 35840 KB Output is correct
7 Correct 35 ms 35704 KB Output is correct
8 Correct 33 ms 35832 KB Output is correct
9 Correct 34 ms 35712 KB Output is correct
10 Correct 36 ms 35840 KB Output is correct
11 Correct 37 ms 35832 KB Output is correct
12 Correct 38 ms 35832 KB Output is correct
13 Correct 35 ms 35840 KB Output is correct
14 Correct 35 ms 35812 KB Output is correct
15 Correct 35 ms 35832 KB Output is correct
16 Correct 34 ms 35728 KB Output is correct
17 Correct 36 ms 35828 KB Output is correct
18 Correct 42 ms 35832 KB Output is correct
19 Correct 34 ms 35840 KB Output is correct
20 Correct 38 ms 35712 KB Output is correct
21 Correct 35 ms 35960 KB Output is correct
22 Correct 36 ms 35840 KB Output is correct
23 Correct 36 ms 35840 KB Output is correct
24 Correct 37 ms 35704 KB Output is correct
25 Correct 37 ms 35816 KB Output is correct
26 Correct 38 ms 36472 KB Output is correct
27 Correct 39 ms 36252 KB Output is correct
28 Correct 39 ms 36600 KB Output is correct
29 Correct 37 ms 36608 KB Output is correct
30 Correct 36 ms 36216 KB Output is correct
31 Correct 37 ms 35840 KB Output is correct
32 Correct 39 ms 36480 KB Output is correct
33 Correct 35 ms 35712 KB Output is correct
34 Correct 34 ms 36224 KB Output is correct
35 Correct 45 ms 36600 KB Output is correct
36 Correct 37 ms 36140 KB Output is correct
37 Correct 41 ms 36224 KB Output is correct
38 Correct 36 ms 35832 KB Output is correct
39 Correct 38 ms 36216 KB Output is correct
40 Correct 42 ms 36216 KB Output is correct
41 Correct 42 ms 36216 KB Output is correct
42 Correct 37 ms 36344 KB Output is correct
43 Correct 38 ms 36348 KB Output is correct
44 Correct 37 ms 35832 KB Output is correct
45 Correct 38 ms 36352 KB Output is correct
46 Correct 39 ms 36352 KB Output is correct
47 Correct 34 ms 35840 KB Output is correct
48 Correct 40 ms 36188 KB Output is correct
49 Correct 37 ms 36600 KB Output is correct
50 Correct 38 ms 36728 KB Output is correct
51 Correct 36 ms 36216 KB Output is correct
52 Correct 35 ms 36216 KB Output is correct
53 Correct 39 ms 36352 KB Output is correct
54 Correct 40 ms 36220 KB Output is correct
55 Correct 35 ms 35744 KB Output is correct
56 Correct 308 ms 49184 KB Output is correct
57 Correct 290 ms 48884 KB Output is correct
58 Correct 37 ms 36224 KB Output is correct
59 Correct 34 ms 35832 KB Output is correct
60 Correct 34 ms 35840 KB Output is correct
61 Correct 281 ms 49024 KB Output is correct
62 Correct 44 ms 36216 KB Output is correct
63 Correct 157 ms 54220 KB Output is correct
64 Correct 316 ms 49048 KB Output is correct
65 Correct 39 ms 36216 KB Output is correct
66 Correct 345 ms 49244 KB Output is correct
67 Correct 34 ms 36216 KB Output is correct
68 Correct 36 ms 36216 KB Output is correct
69 Correct 272 ms 49120 KB Output is correct
70 Correct 42 ms 36344 KB Output is correct
71 Correct 114 ms 48884 KB Output is correct
72 Correct 205 ms 50296 KB Output is correct
73 Correct 36 ms 35832 KB Output is correct
74 Correct 152 ms 54516 KB Output is correct
75 Correct 138 ms 51848 KB Output is correct
76 Correct 37 ms 36216 KB Output is correct
77 Correct 36 ms 36260 KB Output is correct
78 Correct 274 ms 49188 KB Output is correct
79 Correct 334 ms 64988 KB Output is correct
80 Correct 47 ms 36472 KB Output is correct
81 Correct 43 ms 36220 KB Output is correct
82 Correct 36 ms 35832 KB Output is correct
83 Correct 41 ms 35960 KB Output is correct
84 Correct 37 ms 36216 KB Output is correct
85 Correct 475 ms 52196 KB Output is correct
86 Correct 36 ms 36216 KB Output is correct
87 Correct 317 ms 49360 KB Output is correct
88 Correct 40 ms 35832 KB Output is correct
89 Correct 405 ms 49144 KB Output is correct
90 Correct 486 ms 53288 KB Output is correct
91 Correct 439 ms 64568 KB Output is correct
92 Correct 343 ms 49148 KB Output is correct
93 Correct 39 ms 36344 KB Output is correct
94 Correct 43 ms 35832 KB Output is correct
95 Correct 374 ms 62700 KB Output is correct
96 Correct 463 ms 68380 KB Output is correct
97 Correct 37 ms 36344 KB Output is correct
98 Correct 35 ms 35832 KB Output is correct
99 Correct 373 ms 53360 KB Output is correct
100 Correct 38 ms 36216 KB Output is correct
101 Correct 441 ms 50452 KB Output is correct
102 Correct 396 ms 66556 KB Output is correct
103 Correct 37 ms 36608 KB Output is correct
104 Correct 37 ms 36600 KB Output is correct
105 Correct 39 ms 36232 KB Output is correct
106 Correct 36 ms 36224 KB Output is correct
107 Correct 48 ms 36344 KB Output is correct
108 Correct 2200 ms 115268 KB Output is correct
109 Correct 1465 ms 113360 KB Output is correct
110 Correct 878 ms 122212 KB Output is correct
111 Correct 2944 ms 204916 KB Output is correct
112 Correct 1895 ms 166908 KB Output is correct
113 Correct 2150 ms 167948 KB Output is correct
114 Correct 772 ms 100840 KB Output is correct
115 Correct 727 ms 100980 KB Output is correct
116 Correct 2788 ms 107304 KB Output is correct
117 Correct 2982 ms 188252 KB Output is correct
118 Correct 1891 ms 102248 KB Output is correct
119 Correct 2815 ms 188364 KB Output is correct
120 Correct 2818 ms 198996 KB Output is correct
121 Correct 2987 ms 188284 KB Output is correct
122 Correct 2416 ms 124224 KB Output is correct
123 Correct 2437 ms 189248 KB Output is correct
124 Correct 2124 ms 157672 KB Output is correct