QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#643194 | #6729. Unrooted Trie | hewanying | AC ✓ | 314ms | 21728kb | C++14 | 1.1kb | 2024-10-15 19:40:27 | 2024-10-15 19:40:28 |
Judging History
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,-1,sizeof(used));
for(auto i:G[u]){
if(~used[i.w]){
if(used[i.w]==inf) return false;
if(used[i.w]==fa||i.v==fa) ++ct[i.v==fa?used[i.w]: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;
}
这程序好像有点Bug,我给组数据试试?
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 8320kb
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: 314ms
memory: 21728kb
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