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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#641513#6729. Unrooted TriezhichengAC ✓277ms24204kbC++141.4kb2024-10-14 20:52:362024-10-14 20:52:37

Judging History

你现在查看的是最新测评结果

  • [2024-10-14 20:52:37]
  • 评测
  • 测评结果:AC
  • 用时:277ms
  • 内存:24204kb
  • [2024-10-14 20:52:36]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int N=200010;
int cnt,f[N],siz[N],dfn[N],cntt[30],sum[N];
char s[3];
vector<pair<int,int> >v[N];
void add(int x,int y,int z){
	v[x].push_back({y,z});
	v[y].push_back({x,z});
}
void dfs(int u,int fa){
	f[u]=fa;
	siz[u]=1;
	dfn[u]=++cnt;
	for(auto i:v[u]){
		if(i.first!=fa){
			dfs(i.first,u);
			siz[u]+=siz[i.first];
		}
	}
}
void upd(int x,int y){
	sum[x]++;
	sum[y+1]--;
}
int main(){
	int t,n,a,b,pos,all=0,ans=0;
	scanf("%d",&t);
	while(t--){
		all=ans=cnt=0;
		scanf("%d",&n);
		for(int i=1;i<=n;i++){
			sum[i]=0;
			v[i].clear();
		}
		for(int i=1;i<=n-1;i++){
			scanf("%d%d%s",&a,&b,s);
			add(a,b,s[0]-'a'+1);
		}
		dfs(1,0);
		for(int i=1;i<=n;i++){
			for(int j=1;j<=26;j++){
				cntt[j]=0;
			}
			for(auto j:v[i]){
				cntt[j.second]++;
			}
			pos=0;
			for(int j=1;j<=26;j++){
				if(cntt[j]>=3){
					printf("0\n");
					goto lass;
				}
				else if(cntt[j]==2){
					if(pos){
						printf("0\n");
						goto lass;
					}
					pos=j;
				}
			}
			if(!pos){
				continue;
			}
			all++;
			for(auto j:v[i]){
				if(j.second==pos){
					if(j.first==f[i]){
						upd(1,dfn[i]-1);
						upd(dfn[i]+siz[i],n);
					}
					else{
						upd(dfn[j.first],dfn[j.first]+siz[j.first]-1);
					}
				}
			}
		}
		for(int i=1;i<=n;i++){
			sum[i]+=sum[i-1];
			if(sum[i]==all){
				ans++;
			}
		}
		printf("%d\n",ans);
		lass:;
	}
}

这程序好像有点Bug,我给组数据试试?

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 9860kb

input:

2
6
3 1 a
3 2 a
3 4 b
4 5 c
4 6 d
6
3 1 a
3 2 a
3 4 b
5 4 c
6 4 c

output:

2
0

result:

ok 2 number(s): "2 0"

Test #2:

score: 0
Accepted
time: 277ms
memory: 24204kb

input:

1112
19
15 18 a
7 18 c
11 14 b
10 17 b
8 14 a
1 3 b
12 2 a
16 3 c
16 4 b
2 3 a
15 5 a
3 18 d
16 9 a
18 13 b
8 4 b
17 7 a
9 6 a
13 19 a
52
8 32 a
14 51 a
30 52 a
48 36 b
27 39 c
39 51 b
35 15 a
51 52 d
45 51 e
39 26 a
20 12 b
34 18 a
9 12 e
25 5 a
9 13 b
41 51 c
1 52 n
33 14 c
22 30 b
17 4 b
12 52 c
...

output:

15
49
22
68
34
17
28
27
3
4
34
70
37
39
19
24
58
8
16
14
10
73
73
65
35
45
33
81
46
35
78
49
22
13
26
10
33
48
47
3
9
50
8
37
15
84
23
75
26
35
35
61
65
58
30
56
11
8
39
60
88
40
56
17
42
62
12
11
2
59
22
54
14
91
87
1
80
11
45
69
80
33
87
46
56
62
54
80
7
4
48
20
55
19
9
4
38
39
89
35
63
46
24
7
52...

result:

ok 1112 numbers