Submission #1178898

#	Time	Username	Problem	Language	Result	Execution time	Memory
1178898		sasde	Type Printer (IOI08_printer)	C++20	100 / 100	128 ms	99060 KiB

printer

#include<bits/stdc++.h>

#define emb emplace_back

using namespace std;

struct Trie
{
  Trie *child[26]={};
  int cnt=0,h=0;
}tr;
void add(Trie *tr,string s){
  Trie *cur=tr;

  for(char x:s){
    int  c=x-'a';
    if(cur->child[c]==NULL)cur->child[c]=new Trie;
    cur=cur->child[c];
  }
  cur->cnt++;
}
vector<char>res;
void query1(Trie *root){
    Trie *cur=root;
    while(cur->cnt--){
        res.emb('P');
    }
    int u=-1,v=-1;
    for(int i=0;i<26;++i){
      if(cur->child[i]==NULL)continue;
      if(cur->child[i]->h>u){
        u=cur->child[i]->h;
        v=i;
      }
    }
     for(int i=0;i<26;++i){
      if(cur->child[i]==NULL)continue;
      if(i!=v){
       res.emb('a'+i);
      query1(cur->child[i]);
      res.emb('-');
      }
    }
    if(v!=-1){
      res.emb('a'+v);
      query1(cur->child[v]);
      res.emb('-');
    }
}
void query(Trie *root,int u){
    Trie *cur=root;
    cur->h=max(cur->h,u);
    for(int i=0;i<26;++i){
      if(cur->child[i]==NULL)continue;
      query(cur->child[i],u+1);
      cur->h=max(cur->h,cur->child[i]->h);
    }
}
string s;
int n;
main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
  cin >> n;
  for(int i=1;i<=n;++i){
    cin >> s;
    add(&tr,s);
  }
  query(&tr,0);
  query1(&tr);
  while(!res.empty()&&res.back()=='-')res.pop_back();
//  res.emb('a');
  cout <<res.size()<<'\n';
  for(char x:res)cout <<x<<'\n';

}

Compilation message (stderr)

printer.cpp:61:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   61 | main()
      | ^~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10