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Submission #412010

# Submission time Handle Problem Language Result Execution time Memory
412010 2021-05-26T12:10:03 Z faresbasbs Mergers (JOI19_mergers) C++14
100 / 100
 2399 ms 104576 KB 
#include <bits/stdc++.h>
using namespace std;
int n,k,t,cnt=1,deg[500001],color[500001],ent[500001],out[500001],mn[500001],mx[500001],par[500001];
vector<int> segmn,segmx,graph[500001];
set<pair<int,int>> st;

void dfs(int curr , int p){
	ent[curr] = cnt++;
	for(auto i : graph[curr]){
		if(i == p){
			continue;
		}
		par[i] = curr;
		dfs(i,curr);
	}
	out[curr] = cnt-1;
}

void dfs2(int curr , int p , int rt){
	// cout << curr << " " << p << " " << rt << endl;
	for(auto i : graph[curr]){
		if(i == p){
			continue;
		}
		if(st.count({curr,i})){
			deg[rt] += 1 , deg[cnt+1] += 1;
			dfs2(i,curr,++cnt);
		}else{
			dfs2(i,curr,rt);
		}
	}
}

int getmax(int a , int b , int curr , int l , int r){
	if(b < l || a > r){
		return 0;
	}
	if(a <= l && b >= r){
		return segmx[curr];
	}
	int mid = (l+r)/2;
	return max(getmax(a,b,2*curr,l,mid),getmax(a,b,2*curr+1,mid+1,r));
}

int getmin(int a , int b , int curr , int l , int r){
	if(b < l || a > r){
		return 1000000;
	}
	if(a <= l && b >= r){
		return segmn[curr];
	}
	int mid = (l+r)/2;
	return min(getmin(a,b,2*curr,l,mid),getmin(a,b,2*curr+1,mid+1,r));
}

void upd(int curr , int v1 , int v2){
	while(curr){
		segmn[curr] = min(segmn[curr],v1);
		segmx[curr] = max(segmx[curr],v2);
		curr /= 2;
	}
}

int main(){
	cin >> n >> k;
	t = pow(2,ceil(log2(n)));
	segmn.resize(2*t,1000000),segmx.resize(2*t,0);
	for(int i = 0 ; i < n-1 ; i += 1){
		int a,b;
		cin >> a >> b;
		graph[a].push_back(b),graph[b].push_back(a);
	}
	for(int i = 1 ; i <= k ; i += 1){
		mn[i] = 1000000 , mx[i] = 0;
	}
	for(int i = 1 ; i <= n ; i += 1){
		cin >> color[i];
	}
	dfs(1,1);
	for(int i = 1 ; i <= n ; i += 1){
		mn[color[i]] = min(mn[color[i]],ent[i]);
		mx[color[i]] = max(mx[color[i]],ent[i]);
	}
	for(int i = 1 ; i <= n ; i += 1){
		upd(ent[i]+t-1,mn[color[i]],mx[color[i]]);
	}
	for(int i = 2 ; i <= n ; i += 1){
		if(getmin(ent[i],out[i],1,1,t) >= ent[i] && getmax(ent[i],out[i],1,1,t) <= out[i]){
			st.insert({par[i],i});
		}
	}
	cnt = 1;
	dfs2(1,1,1);
	int num = 0;
	for(int i = 1 ; i <= cnt ; i += 1){
		if(deg[i] == 1){
			num += 1;
		}
	}
	cout << (num+1)/2 << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11980 KB Output is correct
2 Correct 8 ms 11980 KB Output is correct
3 Correct 7 ms 12108 KB Output is correct
4 Correct 8 ms 12072 KB Output is correct
5 Correct 7 ms 12040 KB Output is correct
6 Correct 9 ms 11980 KB Output is correct
7 Correct 8 ms 12048 KB Output is correct
8 Correct 8 ms 11980 KB Output is correct
9 Correct 8 ms 11980 KB Output is correct
10 Correct 8 ms 12076 KB Output is correct
11 Correct 9 ms 12016 KB Output is correct
12 Correct 7 ms 12044 KB Output is correct
13 Correct 7 ms 11980 KB Output is correct
14 Correct 7 ms 11980 KB Output is correct
15 Correct 7 ms 12044 KB Output is correct
16 Correct 8 ms 12080 KB Output is correct
17 Correct 9 ms 11980 KB Output is correct
18 Correct 7 ms 12040 KB Output is correct
19 Correct 7 ms 11980 KB Output is correct
20 Correct 9 ms 11996 KB Output is correct
21 Correct 7 ms 12036 KB Output is correct
22 Correct 9 ms 12048 KB Output is correct
23 Correct 8 ms 12028 KB Output is correct
24 Correct 8 ms 12044 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11980 KB Output is correct
2 Correct 8 ms 11980 KB Output is correct
3 Correct 7 ms 12108 KB Output is correct
4 Correct 8 ms 12072 KB Output is correct
5 Correct 7 ms 12040 KB Output is correct
6 Correct 9 ms 11980 KB Output is correct
7 Correct 8 ms 12048 KB Output is correct
8 Correct 8 ms 11980 KB Output is correct
9 Correct 8 ms 11980 KB Output is correct
10 Correct 8 ms 12076 KB Output is correct
11 Correct 9 ms 12016 KB Output is correct
12 Correct 7 ms 12044 KB Output is correct
13 Correct 7 ms 11980 KB Output is correct
14 Correct 7 ms 11980 KB Output is correct
15 Correct 7 ms 12044 KB Output is correct
16 Correct 8 ms 12080 KB Output is correct
17 Correct 9 ms 11980 KB Output is correct
18 Correct 7 ms 12040 KB Output is correct
19 Correct 7 ms 11980 KB Output is correct
20 Correct 9 ms 11996 KB Output is correct
21 Correct 7 ms 12036 KB Output is correct
22 Correct 9 ms 12048 KB Output is correct
23 Correct 8 ms 12028 KB Output is correct
24 Correct 8 ms 12044 KB Output is correct
25 Correct 7 ms 12044 KB Output is correct
26 Correct 14 ms 12408 KB Output is correct
27 Correct 11 ms 12312 KB Output is correct
28 Correct 13 ms 12468 KB Output is correct
29 Correct 13 ms 12492 KB Output is correct
30 Correct 11 ms 12232 KB Output is correct
31 Correct 8 ms 12108 KB Output is correct
32 Correct 15 ms 12444 KB Output is correct
33 Correct 8 ms 11980 KB Output is correct
34 Correct 13 ms 12332 KB Output is correct
35 Correct 13 ms 12484 KB Output is correct
36 Correct 11 ms 12248 KB Output is correct
37 Correct 12 ms 12312 KB Output is correct
38 Correct 8 ms 12108 KB Output is correct
39 Correct 12 ms 12316 KB Output is correct
40 Correct 11 ms 12272 KB Output is correct
41 Correct 11 ms 12236 KB Output is correct
42 Correct 12 ms 12352 KB Output is correct
43 Correct 12 ms 12448 KB Output is correct
44 Correct 8 ms 12040 KB Output is correct
45 Correct 13 ms 12364 KB Output is correct
46 Correct 12 ms 12384 KB Output is correct
47 Correct 9 ms 12012 KB Output is correct
48 Correct 12 ms 12360 KB Output is correct
49 Correct 13 ms 12492 KB Output is correct
50 Correct 13 ms 12460 KB Output is correct
51 Correct 12 ms 12312 KB Output is correct
52 Correct 11 ms 12236 KB Output is correct
53 Correct 11 ms 12364 KB Output is correct
54 Correct 11 ms 12236 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11980 KB Output is correct
2 Correct 8 ms 11980 KB Output is correct
3 Correct 7 ms 12108 KB Output is correct
4 Correct 8 ms 12072 KB Output is correct
5 Correct 7 ms 12040 KB Output is correct
6 Correct 9 ms 11980 KB Output is correct
7 Correct 8 ms 12048 KB Output is correct
8 Correct 8 ms 11980 KB Output is correct
9 Correct 8 ms 11980 KB Output is correct
10 Correct 8 ms 12076 KB Output is correct
11 Correct 9 ms 12016 KB Output is correct
12 Correct 7 ms 12044 KB Output is correct
13 Correct 7 ms 11980 KB Output is correct
14 Correct 7 ms 11980 KB Output is correct
15 Correct 7 ms 12044 KB Output is correct
16 Correct 8 ms 12080 KB Output is correct
17 Correct 9 ms 11980 KB Output is correct
18 Correct 7 ms 12040 KB Output is correct
19 Correct 7 ms 11980 KB Output is correct
20 Correct 9 ms 11996 KB Output is correct
21 Correct 7 ms 12036 KB Output is correct
22 Correct 9 ms 12048 KB Output is correct
23 Correct 8 ms 12028 KB Output is correct
24 Correct 8 ms 12044 KB Output is correct
25 Correct 9 ms 12108 KB Output is correct
26 Correct 146 ms 20720 KB Output is correct
27 Correct 182 ms 20360 KB Output is correct
28 Correct 12 ms 12292 KB Output is correct
29 Correct 8 ms 11980 KB Output is correct
30 Correct 7 ms 12108 KB Output is correct
31 Correct 187 ms 20332 KB Output is correct
32 Correct 12 ms 12236 KB Output is correct
33 Correct 222 ms 27472 KB Output is correct
34 Correct 178 ms 20264 KB Output is correct
35 Correct 15 ms 12376 KB Output is correct
36 Correct 191 ms 21204 KB Output is correct
37 Correct 12 ms 12236 KB Output is correct
38 Correct 12 ms 12236 KB Output is correct
39 Correct 142 ms 20580 KB Output is correct
40 Correct 13 ms 12492 KB Output is correct
41 Correct 182 ms 20256 KB Output is correct
42 Correct 195 ms 22704 KB Output is correct
43 Correct 8 ms 11980 KB Output is correct
44 Correct 181 ms 27664 KB Output is correct
45 Correct 189 ms 24008 KB Output is correct
46 Correct 11 ms 12236 KB Output is correct
47 Correct 12 ms 12308 KB Output is correct

Subtask #4
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 156 ms 20708 KB Output is correct
2 Correct 240 ms 26808 KB Output is correct
3 Correct 13 ms 12364 KB Output is correct
4 Correct 13 ms 12316 KB Output is correct
5 Correct 9 ms 12044 KB Output is correct
6 Correct 10 ms 12084 KB Output is correct
7 Correct 12 ms 12236 KB Output is correct
8 Correct 255 ms 21596 KB Output is correct
9 Correct 12 ms 12236 KB Output is correct
10 Correct 184 ms 20536 KB Output is correct
11 Correct 9 ms 12108 KB Output is correct
12 Correct 194 ms 20616 KB Output is correct
13 Correct 223 ms 21924 KB Output is correct
14 Correct 297 ms 26464 KB Output is correct
15 Correct 163 ms 20596 KB Output is correct
16 Correct 12 ms 12364 KB Output is correct
17 Correct 8 ms 12108 KB Output is correct
18 Correct 234 ms 25676 KB Output is correct
19 Correct 321 ms 30404 KB Output is correct
20 Correct 13 ms 12272 KB Output is correct
21 Correct 8 ms 11980 KB Output is correct
22 Correct 184 ms 22120 KB Output is correct
23 Correct 12 ms 12236 KB Output is correct
24 Correct 225 ms 20972 KB Output is correct
25 Correct 323 ms 29016 KB Output is correct
26 Correct 14 ms 12468 KB Output is correct
27 Correct 15 ms 12632 KB Output is correct
28 Correct 13 ms 12324 KB Output is correct
29 Correct 15 ms 12232 KB Output is correct
30 Correct 13 ms 12308 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11980 KB Output is correct
2 Correct 8 ms 11980 KB Output is correct
3 Correct 7 ms 12108 KB Output is correct
4 Correct 8 ms 12072 KB Output is correct
5 Correct 7 ms 12040 KB Output is correct
6 Correct 9 ms 11980 KB Output is correct
7 Correct 8 ms 12048 KB Output is correct
8 Correct 8 ms 11980 KB Output is correct
9 Correct 8 ms 11980 KB Output is correct
10 Correct 8 ms 12076 KB Output is correct
11 Correct 9 ms 12016 KB Output is correct
12 Correct 7 ms 12044 KB Output is correct
13 Correct 7 ms 11980 KB Output is correct
14 Correct 7 ms 11980 KB Output is correct
15 Correct 7 ms 12044 KB Output is correct
16 Correct 8 ms 12080 KB Output is correct
17 Correct 9 ms 11980 KB Output is correct
18 Correct 7 ms 12040 KB Output is correct
19 Correct 7 ms 11980 KB Output is correct
20 Correct 9 ms 11996 KB Output is correct
21 Correct 7 ms 12036 KB Output is correct
22 Correct 9 ms 12048 KB Output is correct
23 Correct 8 ms 12028 KB Output is correct
24 Correct 8 ms 12044 KB Output is correct
25 Correct 7 ms 12044 KB Output is correct
26 Correct 14 ms 12408 KB Output is correct
27 Correct 11 ms 12312 KB Output is correct
28 Correct 13 ms 12468 KB Output is correct
29 Correct 13 ms 12492 KB Output is correct
30 Correct 11 ms 12232 KB Output is correct
31 Correct 8 ms 12108 KB Output is correct
32 Correct 15 ms 12444 KB Output is correct
33 Correct 8 ms 11980 KB Output is correct
34 Correct 13 ms 12332 KB Output is correct
35 Correct 13 ms 12484 KB Output is correct
36 Correct 11 ms 12248 KB Output is correct
37 Correct 12 ms 12312 KB Output is correct
38 Correct 8 ms 12108 KB Output is correct
39 Correct 12 ms 12316 KB Output is correct
40 Correct 11 ms 12272 KB Output is correct
41 Correct 11 ms 12236 KB Output is correct
42 Correct 12 ms 12352 KB Output is correct
43 Correct 12 ms 12448 KB Output is correct
44 Correct 8 ms 12040 KB Output is correct
45 Correct 13 ms 12364 KB Output is correct
46 Correct 12 ms 12384 KB Output is correct
47 Correct 9 ms 12012 KB Output is correct
48 Correct 12 ms 12360 KB Output is correct
49 Correct 13 ms 12492 KB Output is correct
50 Correct 13 ms 12460 KB Output is correct
51 Correct 12 ms 12312 KB Output is correct
52 Correct 11 ms 12236 KB Output is correct
53 Correct 11 ms 12364 KB Output is correct
54 Correct 11 ms 12236 KB Output is correct
55 Correct 9 ms 12108 KB Output is correct
56 Correct 146 ms 20720 KB Output is correct
57 Correct 182 ms 20360 KB Output is correct
58 Correct 12 ms 12292 KB Output is correct
59 Correct 8 ms 11980 KB Output is correct
60 Correct 7 ms 12108 KB Output is correct
61 Correct 187 ms 20332 KB Output is correct
62 Correct 12 ms 12236 KB Output is correct
63 Correct 222 ms 27472 KB Output is correct
64 Correct 178 ms 20264 KB Output is correct
65 Correct 15 ms 12376 KB Output is correct
66 Correct 191 ms 21204 KB Output is correct
67 Correct 12 ms 12236 KB Output is correct
68 Correct 12 ms 12236 KB Output is correct
69 Correct 142 ms 20580 KB Output is correct
70 Correct 13 ms 12492 KB Output is correct
71 Correct 182 ms 20256 KB Output is correct
72 Correct 195 ms 22704 KB Output is correct
73 Correct 8 ms 11980 KB Output is correct
74 Correct 181 ms 27664 KB Output is correct
75 Correct 189 ms 24008 KB Output is correct
76 Correct 11 ms 12236 KB Output is correct
77 Correct 12 ms 12308 KB Output is correct
78 Correct 156 ms 20708 KB Output is correct
79 Correct 240 ms 26808 KB Output is correct
80 Correct 13 ms 12364 KB Output is correct
81 Correct 13 ms 12316 KB Output is correct
82 Correct 9 ms 12044 KB Output is correct
83 Correct 10 ms 12084 KB Output is correct
84 Correct 12 ms 12236 KB Output is correct
85 Correct 255 ms 21596 KB Output is correct
86 Correct 12 ms 12236 KB Output is correct
87 Correct 184 ms 20536 KB Output is correct
88 Correct 9 ms 12108 KB Output is correct
89 Correct 194 ms 20616 KB Output is correct
90 Correct 223 ms 21924 KB Output is correct
91 Correct 297 ms 26464 KB Output is correct
92 Correct 163 ms 20596 KB Output is correct
93 Correct 12 ms 12364 KB Output is correct
94 Correct 8 ms 12108 KB Output is correct
95 Correct 234 ms 25676 KB Output is correct
96 Correct 321 ms 30404 KB Output is correct
97 Correct 13 ms 12272 KB Output is correct
98 Correct 8 ms 11980 KB Output is correct
99 Correct 184 ms 22120 KB Output is correct
100 Correct 12 ms 12236 KB Output is correct
101 Correct 225 ms 20972 KB Output is correct
102 Correct 323 ms 29016 KB Output is correct
103 Correct 14 ms 12468 KB Output is correct
104 Correct 15 ms 12632 KB Output is correct
105 Correct 13 ms 12324 KB Output is correct
106 Correct 15 ms 12232 KB Output is correct
107 Correct 13 ms 12308 KB Output is correct
108 Correct 1201 ms 59324 KB Output is correct
109 Correct 1217 ms 69828 KB Output is correct
110 Correct 1225 ms 81040 KB Output is correct
111 Correct 2399 ms 104576 KB Output is correct
112 Correct 1881 ms 84900 KB Output is correct
113 Correct 1498 ms 79740 KB Output is correct
114 Correct 1097 ms 51804 KB Output is correct
115 Correct 1056 ms 51800 KB Output is correct
116 Correct 1236 ms 54548 KB Output is correct
117 Correct 2173 ms 83472 KB Output is correct
118 Correct 1098 ms 52220 KB Output is correct
119 Correct 2181 ms 83588 KB Output is correct
120 Correct 2284 ms 97492 KB Output is correct
121 Correct 2149 ms 83424 KB Output is correct
122 Correct 1463 ms 60916 KB Output is correct
123 Correct 1830 ms 85068 KB Output is correct
124 Correct 2194 ms 73520 KB Output is correct