#include<bits/stdc++.h>
using namespace std;
struct Node{
Node* c[26];
int maxdepth=0;
bool leaf=false;
Node(){
for(int i=0;i<26;i++) c[i]=nullptr;
}
};
Node* root=new Node();
void insert(string s){
Node* node=root;
int n=s.length();
for(int i=0;i<n;i++){
if(node->c[s[i]-'a']==nullptr) node->c[s[i]-'a']=new Node();
node=node->c[s[i]-'a'];
node->maxdepth=max(node->maxdepth,n);
}
node->leaf=true;
}
int k;
vector<char> op;
void dfs(Node* node){
int best=-1;
int mx=-1;
for(int i=0;i<26;i++){
if(node->c[i]!=nullptr){
if(node->c[i]->maxdepth>mx){
mx=node->c[i]->maxdepth;
best=i;
}
}
}
if(node->leaf){
k--;
op.push_back('P');
}
for(int j=0;j<26;j++){
if(node->c[j]){
if(j==best) continue;
op.push_back(char('a'+j));
dfs(node->c[j]);
if(k!=0)
op.push_back('-');
}
}
if(best!=-1){
op.push_back(char(best+'a'));
dfs(node->c[best]);
if(k!=0) op.push_back('-');
}
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int n;
cin>>n;
k=n;
string s;
for(int i=0;i<n;i++){
cin>>s;
insert(s);
}
dfs(root);
cout<<op.size()<<endl;
for(auto x:op){
cout<<x<<endl;
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
8 ms |
1116 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
15 ms |
1884 KB |
Output is correct |
2 |
Correct |
18 ms |
2396 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
53 ms |
5980 KB |
Output is correct |
2 |
Correct |
119 ms |
12520 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
136 ms |
14800 KB |
Output is correct |
2 |
Correct |
39 ms |
3164 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
346 ms |
36552 KB |
Output is correct |
2 |
Correct |
778 ms |
83400 KB |
Output is correct |
3 |
Correct |
404 ms |
42696 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
284 ms |
28620 KB |
Output is correct |
2 |
Correct |
933 ms |
99396 KB |
Output is correct |
3 |
Correct |
491 ms |
48588 KB |
Output is correct |
4 |
Correct |
874 ms |
93640 KB |
Output is correct |