Submission #489760

#	Time	Username	Problem	Language	Result	Execution time	Memory
489760		HappyPacMan	Type Printer (IOI08_printer)	C++14	100 / 100	158 ms	99644 KiB

printer

#include<bits/stdc++.h>

using namespace std;

struct Node{
  Node *nxt[26];
  int dep,times;
  Node(){
    for(int i=0;i<26;i++) nxt[i] = NULL;
    dep = times = 0;
  }
};
void Insert(Node *root,string str){
  if(str.empty()){
    root->times++;
    return;
  }
  char c = str.back();
  if(root->nxt[c-'a'] == NULL) root->nxt[c-'a'] = new Node;
  str.pop_back();
  Insert(root->nxt[c-'a'],str);
  root->dep = max(root->dep,root->nxt[c-'a']->dep+1);
}
vector<char> res;
void Run(Node *root){
  for(int i=0;i<root->times;i++) res.push_back('P');
  
  for(int i=0;i<26;i++){
    if(root->nxt[i] != NULL && root->nxt[i]->dep != root->dep-1){
      res.push_back(i+'a');
      Run(root->nxt[i]);
      res.push_back('-');
    }
  }
  for(int i=0;i<26;i++){
    if(root->nxt[i] != NULL && root->nxt[i]->dep == root->dep-1){
      res.push_back(i+'a');
      Run(root->nxt[i]);
      res.push_back('-');
    }
  }
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);
  
  int N;
  cin >> N;
  Node *root = new Node();
  for(int i=0;i<N;i++){
    string str;
    cin >> str;
    reverse(str.begin(),str.end());
    Insert(root,str);
  }
  Run(root);
  while(res.back() == '-') res.pop_back();
  cout << res.size() << '\n';
  for(char c : res) cout << c << '\n';
	return 0;
}

• 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