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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
#643171#6729. Unrooted TriehewanyingWA 251ms21600kbC++141.0kb2024-10-15 19:28:452024-10-15 19:28:45

Judging History

你现在查看的是最新测评结果

  • [2024-10-15 19:28:45]
  • 评测
  • 测评结果:WA
  • 用时:251ms
  • 内存:21600kb
  • [2024-10-15 19:28:45]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define pb push_back

const int N=2e5+5,inf=1e9;
int n,used[27],ct[N],tot=0,ans=0;
struct Nod{int v,w;};
vector<Nod> G[N];

void NO(){cout<<"0\n",exit(0);}

bool dfs(int u,int fa){
  memset(used,0,sizeof(used));
  for(auto i:G[u]){
	if(used[i.w]){
	  if(used[i.w]==inf) return false;
      if(used[i.w]==fa) ++ct[i.v],--ct[u];
      else ++ct[i.v],++ct[used[i.w]],++tot;
	  used[i.w]=inf;
	}else used[i.w]=i.v;
  }

  for(auto i:G[u]) if(i.v!=fa&&!dfs(i.v,u)) return false;
  return true;
}

void getans(int u,int fa){
  if(ct[u]==tot) ++ans;
  for(auto i:G[u]) if(i.v!=fa) ct[i.v]+=ct[u],getans(i.v,u);
}

void SOLVE(){
  cin>>n;ans=tot=0;
  for(int i=1;i<=n;i++) G[i].clear(),ct[i]=0;
  for(int i=1,u,v;i<n;i++){
	char ch;cin>>u>>v>>ch;
	G[u].pb({v,ch-'a'}),G[v].pb({u,ch-'a'});
  }
  if(!dfs(1,0)) return cout<<"0\n",void();
  getans(1,0);cout<<ans<<'\n';
}

int main(){
  ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
  int _;cin>>_;
  while(_--) SOLVE();
  return 0;
}

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 8276kb

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: -100
Wrong Answer
time: 251ms
memory: 21600kb

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:

14
3
11
0
34
17
15
3
3
0
28
70
3
4
19
11
5
8
0
7
10
0
2
0
4
19
5
0
0
35
78
4
3
3
0
10
9
48
1
4
4
0
3
0
1
1
4
5
26
0
11
1
0
3
2
0
1
8
2
5
0
1
2
17
27
1
8
0
2
0
2
54
14
91
0
1
6
11
6
2
4
2
87
2
5
0
1
2
6
0
1
3
0
19
2
4
13
39
89
3
23
46
6
7
2
4
1
25
6
8
5
56
0
2
0
0
1
49
3
1
0
2
3
9
4
36
38
2
20
1
0
2
...

result:

wrong answer 1st numbers differ - expected: '15', found: '14'