Submission #102399

# Submission time Handle Problem Language Result Execution time Memory
102399 2019-03-24T16:27:19 Z Dat160601 Mergers (JOI19_mergers) C++17
70 / 100
3000 ms 204780 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);
}
# Verdict Execution time Memory Grader output
1 Correct 38 ms 35832 KB Output is correct
2 Correct 34 ms 35704 KB Output is correct
3 Correct 38 ms 35704 KB Output is correct
4 Correct 35 ms 35832 KB Output is correct
5 Correct 37 ms 35832 KB Output is correct
6 Correct 36 ms 35812 KB Output is correct
7 Correct 36 ms 35812 KB Output is correct
8 Correct 38 ms 35764 KB Output is correct
9 Correct 39 ms 35704 KB Output is correct
10 Correct 35 ms 35832 KB Output is correct
11 Correct 37 ms 35840 KB Output is correct
12 Correct 34 ms 35832 KB Output is correct
13 Correct 43 ms 35832 KB Output is correct
14 Correct 33 ms 35832 KB Output is correct
15 Correct 34 ms 35840 KB Output is correct
16 Correct 38 ms 35908 KB Output is correct
17 Correct 35 ms 35712 KB Output is correct
18 Correct 40 ms 35772 KB Output is correct
19 Correct 39 ms 35840 KB Output is correct
20 Correct 35 ms 35704 KB Output is correct
21 Correct 39 ms 35832 KB Output is correct
22 Correct 44 ms 35832 KB Output is correct
23 Correct 36 ms 35832 KB Output is correct
24 Correct 40 ms 35832 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 38 ms 35832 KB Output is correct
2 Correct 34 ms 35704 KB Output is correct
3 Correct 38 ms 35704 KB Output is correct
4 Correct 35 ms 35832 KB Output is correct
5 Correct 37 ms 35832 KB Output is correct
6 Correct 36 ms 35812 KB Output is correct
7 Correct 36 ms 35812 KB Output is correct
8 Correct 38 ms 35764 KB Output is correct
9 Correct 39 ms 35704 KB Output is correct
10 Correct 35 ms 35832 KB Output is correct
11 Correct 37 ms 35840 KB Output is correct
12 Correct 34 ms 35832 KB Output is correct
13 Correct 43 ms 35832 KB Output is correct
14 Correct 33 ms 35832 KB Output is correct
15 Correct 34 ms 35840 KB Output is correct
16 Correct 38 ms 35908 KB Output is correct
17 Correct 35 ms 35712 KB Output is correct
18 Correct 40 ms 35772 KB Output is correct
19 Correct 39 ms 35840 KB Output is correct
20 Correct 35 ms 35704 KB Output is correct
21 Correct 39 ms 35832 KB Output is correct
22 Correct 44 ms 35832 KB Output is correct
23 Correct 36 ms 35832 KB Output is correct
24 Correct 40 ms 35832 KB Output is correct
25 Correct 38 ms 35840 KB Output is correct
26 Correct 38 ms 36472 KB Output is correct
27 Correct 38 ms 36224 KB Output is correct
28 Correct 38 ms 36600 KB Output is correct
29 Correct 46 ms 36600 KB Output is correct
30 Correct 41 ms 36216 KB Output is correct
31 Correct 34 ms 35832 KB Output is correct
32 Correct 37 ms 36600 KB Output is correct
33 Correct 38 ms 35832 KB Output is correct
34 Correct 37 ms 36216 KB Output is correct
35 Correct 40 ms 36600 KB Output is correct
36 Correct 40 ms 36216 KB Output is correct
37 Correct 43 ms 36344 KB Output is correct
38 Correct 34 ms 35832 KB Output is correct
39 Correct 37 ms 36224 KB Output is correct
40 Correct 40 ms 36216 KB Output is correct
41 Correct 37 ms 36216 KB Output is correct
42 Correct 37 ms 36352 KB Output is correct
43 Correct 39 ms 36344 KB Output is correct
44 Correct 35 ms 35832 KB Output is correct
45 Correct 38 ms 36344 KB Output is correct
46 Correct 38 ms 36344 KB Output is correct
47 Correct 36 ms 35784 KB Output is correct
48 Correct 37 ms 36216 KB Output is correct
49 Correct 39 ms 36600 KB Output is correct
50 Correct 38 ms 36728 KB Output is correct
51 Correct 40 ms 36216 KB Output is correct
52 Correct 47 ms 36216 KB Output is correct
53 Correct 40 ms 36344 KB Output is correct
54 Correct 38 ms 36216 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 38 ms 35832 KB Output is correct
2 Correct 34 ms 35704 KB Output is correct
3 Correct 38 ms 35704 KB Output is correct
4 Correct 35 ms 35832 KB Output is correct
5 Correct 37 ms 35832 KB Output is correct
6 Correct 36 ms 35812 KB Output is correct
7 Correct 36 ms 35812 KB Output is correct
8 Correct 38 ms 35764 KB Output is correct
9 Correct 39 ms 35704 KB Output is correct
10 Correct 35 ms 35832 KB Output is correct
11 Correct 37 ms 35840 KB Output is correct
12 Correct 34 ms 35832 KB Output is correct
13 Correct 43 ms 35832 KB Output is correct
14 Correct 33 ms 35832 KB Output is correct
15 Correct 34 ms 35840 KB Output is correct
16 Correct 38 ms 35908 KB Output is correct
17 Correct 35 ms 35712 KB Output is correct
18 Correct 40 ms 35772 KB Output is correct
19 Correct 39 ms 35840 KB Output is correct
20 Correct 35 ms 35704 KB Output is correct
21 Correct 39 ms 35832 KB Output is correct
22 Correct 44 ms 35832 KB Output is correct
23 Correct 36 ms 35832 KB Output is correct
24 Correct 40 ms 35832 KB Output is correct
25 Correct 37 ms 35708 KB Output is correct
26 Correct 304 ms 49312 KB Output is correct
27 Correct 307 ms 49024 KB Output is correct
28 Correct 40 ms 36216 KB Output is correct
29 Correct 34 ms 35712 KB Output is correct
30 Correct 39 ms 35840 KB Output is correct
31 Correct 317 ms 49124 KB Output is correct
32 Correct 43 ms 36216 KB Output is correct
33 Correct 170 ms 54136 KB Output is correct
34 Correct 322 ms 48956 KB Output is correct
35 Correct 38 ms 36216 KB Output is correct
36 Correct 329 ms 49272 KB Output is correct
37 Correct 37 ms 36344 KB Output is correct
38 Correct 39 ms 36224 KB Output is correct
39 Correct 322 ms 49148 KB Output is correct
40 Correct 38 ms 36344 KB Output is correct
41 Correct 132 ms 49012 KB Output is correct
42 Correct 235 ms 50372 KB Output is correct
43 Correct 33 ms 35832 KB Output is correct
44 Correct 156 ms 54484 KB Output is correct
45 Correct 127 ms 51796 KB Output is correct
46 Correct 35 ms 36216 KB Output is correct
47 Correct 39 ms 36216 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 254 ms 49152 KB Output is correct
2 Correct 293 ms 65028 KB Output is correct
3 Correct 40 ms 36600 KB Output is correct
4 Correct 35 ms 36224 KB Output is correct
5 Correct 38 ms 35960 KB Output is correct
6 Correct 36 ms 35832 KB Output is correct
7 Correct 36 ms 36216 KB Output is correct
8 Correct 477 ms 52212 KB Output is correct
9 Correct 40 ms 36188 KB Output is correct
10 Correct 371 ms 49376 KB Output is correct
11 Correct 34 ms 35832 KB Output is correct
12 Correct 363 ms 49200 KB Output is correct
13 Correct 500 ms 53288 KB Output is correct
14 Correct 405 ms 64568 KB Output is correct
15 Correct 311 ms 49324 KB Output is correct
16 Correct 41 ms 36472 KB Output is correct
17 Correct 33 ms 35840 KB Output is correct
18 Correct 316 ms 62536 KB Output is correct
19 Correct 388 ms 68668 KB Output is correct
20 Correct 37 ms 36472 KB Output is correct
21 Correct 32 ms 35840 KB Output is correct
22 Correct 308 ms 53376 KB Output is correct
23 Correct 39 ms 36224 KB Output is correct
24 Correct 377 ms 50552 KB Output is correct
25 Correct 457 ms 66528 KB Output is correct
26 Correct 40 ms 36728 KB Output is correct
27 Correct 42 ms 36600 KB Output is correct
28 Correct 45 ms 36224 KB Output is correct
29 Correct 36 ms 36216 KB Output is correct
30 Correct 37 ms 36352 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 38 ms 35832 KB Output is correct
2 Correct 34 ms 35704 KB Output is correct
3 Correct 38 ms 35704 KB Output is correct
4 Correct 35 ms 35832 KB Output is correct
5 Correct 37 ms 35832 KB Output is correct
6 Correct 36 ms 35812 KB Output is correct
7 Correct 36 ms 35812 KB Output is correct
8 Correct 38 ms 35764 KB Output is correct
9 Correct 39 ms 35704 KB Output is correct
10 Correct 35 ms 35832 KB Output is correct
11 Correct 37 ms 35840 KB Output is correct
12 Correct 34 ms 35832 KB Output is correct
13 Correct 43 ms 35832 KB Output is correct
14 Correct 33 ms 35832 KB Output is correct
15 Correct 34 ms 35840 KB Output is correct
16 Correct 38 ms 35908 KB Output is correct
17 Correct 35 ms 35712 KB Output is correct
18 Correct 40 ms 35772 KB Output is correct
19 Correct 39 ms 35840 KB Output is correct
20 Correct 35 ms 35704 KB Output is correct
21 Correct 39 ms 35832 KB Output is correct
22 Correct 44 ms 35832 KB Output is correct
23 Correct 36 ms 35832 KB Output is correct
24 Correct 40 ms 35832 KB Output is correct
25 Correct 38 ms 35840 KB Output is correct
26 Correct 38 ms 36472 KB Output is correct
27 Correct 38 ms 36224 KB Output is correct
28 Correct 38 ms 36600 KB Output is correct
29 Correct 46 ms 36600 KB Output is correct
30 Correct 41 ms 36216 KB Output is correct
31 Correct 34 ms 35832 KB Output is correct
32 Correct 37 ms 36600 KB Output is correct
33 Correct 38 ms 35832 KB Output is correct
34 Correct 37 ms 36216 KB Output is correct
35 Correct 40 ms 36600 KB Output is correct
36 Correct 40 ms 36216 KB Output is correct
37 Correct 43 ms 36344 KB Output is correct
38 Correct 34 ms 35832 KB Output is correct
39 Correct 37 ms 36224 KB Output is correct
40 Correct 40 ms 36216 KB Output is correct
41 Correct 37 ms 36216 KB Output is correct
42 Correct 37 ms 36352 KB Output is correct
43 Correct 39 ms 36344 KB Output is correct
44 Correct 35 ms 35832 KB Output is correct
45 Correct 38 ms 36344 KB Output is correct
46 Correct 38 ms 36344 KB Output is correct
47 Correct 36 ms 35784 KB Output is correct
48 Correct 37 ms 36216 KB Output is correct
49 Correct 39 ms 36600 KB Output is correct
50 Correct 38 ms 36728 KB Output is correct
51 Correct 40 ms 36216 KB Output is correct
52 Correct 47 ms 36216 KB Output is correct
53 Correct 40 ms 36344 KB Output is correct
54 Correct 38 ms 36216 KB Output is correct
55 Correct 37 ms 35708 KB Output is correct
56 Correct 304 ms 49312 KB Output is correct
57 Correct 307 ms 49024 KB Output is correct
58 Correct 40 ms 36216 KB Output is correct
59 Correct 34 ms 35712 KB Output is correct
60 Correct 39 ms 35840 KB Output is correct
61 Correct 317 ms 49124 KB Output is correct
62 Correct 43 ms 36216 KB Output is correct
63 Correct 170 ms 54136 KB Output is correct
64 Correct 322 ms 48956 KB Output is correct
65 Correct 38 ms 36216 KB Output is correct
66 Correct 329 ms 49272 KB Output is correct
67 Correct 37 ms 36344 KB Output is correct
68 Correct 39 ms 36224 KB Output is correct
69 Correct 322 ms 49148 KB Output is correct
70 Correct 38 ms 36344 KB Output is correct
71 Correct 132 ms 49012 KB Output is correct
72 Correct 235 ms 50372 KB Output is correct
73 Correct 33 ms 35832 KB Output is correct
74 Correct 156 ms 54484 KB Output is correct
75 Correct 127 ms 51796 KB Output is correct
76 Correct 35 ms 36216 KB Output is correct
77 Correct 39 ms 36216 KB Output is correct
78 Correct 254 ms 49152 KB Output is correct
79 Correct 293 ms 65028 KB Output is correct
80 Correct 40 ms 36600 KB Output is correct
81 Correct 35 ms 36224 KB Output is correct
82 Correct 38 ms 35960 KB Output is correct
83 Correct 36 ms 35832 KB Output is correct
84 Correct 36 ms 36216 KB Output is correct
85 Correct 477 ms 52212 KB Output is correct
86 Correct 40 ms 36188 KB Output is correct
87 Correct 371 ms 49376 KB Output is correct
88 Correct 34 ms 35832 KB Output is correct
89 Correct 363 ms 49200 KB Output is correct
90 Correct 500 ms 53288 KB Output is correct
91 Correct 405 ms 64568 KB Output is correct
92 Correct 311 ms 49324 KB Output is correct
93 Correct 41 ms 36472 KB Output is correct
94 Correct 33 ms 35840 KB Output is correct
95 Correct 316 ms 62536 KB Output is correct
96 Correct 388 ms 68668 KB Output is correct
97 Correct 37 ms 36472 KB Output is correct
98 Correct 32 ms 35840 KB Output is correct
99 Correct 308 ms 53376 KB Output is correct
100 Correct 39 ms 36224 KB Output is correct
101 Correct 377 ms 50552 KB Output is correct
102 Correct 457 ms 66528 KB Output is correct
103 Correct 40 ms 36728 KB Output is correct
104 Correct 42 ms 36600 KB Output is correct
105 Correct 45 ms 36224 KB Output is correct
106 Correct 36 ms 36216 KB Output is correct
107 Correct 37 ms 36352 KB Output is correct
108 Correct 2220 ms 115148 KB Output is correct
109 Correct 1334 ms 113480 KB Output is correct
110 Correct 852 ms 122212 KB Output is correct
111 Correct 2949 ms 204780 KB Output is correct
112 Correct 1895 ms 167120 KB Output is correct
113 Correct 2105 ms 168048 KB Output is correct
114 Correct 711 ms 100792 KB Output is correct
115 Correct 743 ms 101092 KB Output is correct
116 Correct 2837 ms 107496 KB Output is correct
117 Execution timed out 3003 ms 188116 KB Time limit exceeded
118 Halted 0 ms 0 KB -