Submission #1178890

#	Time	Username	Problem	Language	Result	Execution time	Memory
1178890		sasde	Type Printer (IOI08_printer)	C++20	100 / 100	120 ms	99016 KiB

printer

#include<bits/stdc++.h>
#define task "a"
#define ii pair<int,int>
#define iii pair<int,ii>
#define iv pair<ii,ii>
#define se second
#define fi first
#define ffi fi.fi
#define sfi se.fi
#define sse se.se
#define fse fi.se
#define lt(i, c, d) for(int i = c; i <= d; ++i)
#define fl(i, c, d) for(int i = d; i >= c; --i)
#define pb push_back
#define emb emplace_back
#define emf emplace_front
#define em emplace
using namespace std;
const int N=1e6+5,lg=20,mod=1e9+7;
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int Rand(int u,int v){
 return u+rd()%(v-u+1);
}
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;
void solve(){
  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';

}
main()
{
  srand(time(0));
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    if(fopen(task".inp","r")){
      freopen(task".inp","r",stdin);
      freopen(task".out","w",stdout);
    }
    int t=1;
 //   cin >> t;
while(t--){
    solve();
    // cout<<'\n';
}

}

Compilation message (stderr)

printer.cpp:92:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   92 | main()
      | ^~~~
printer.cpp: In function 'int main()':
printer.cpp:99:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |       freopen(task".inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
printer.cpp:100:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |       freopen(task".out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• 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