Submission #498596

#	Time	Username	Problem	Language	Result	Execution time	Memory
498596		Hi_Im_Not_Meo_Meo	Type Printer (IOI08_printer)	C++14	100 / 100	128 ms	113252 KiB

printer

#include"bits/stdc++.h"
#define f(i,j,k) for(int i=j;i<=k;i++)
#define pb push_back

const int N = 3e4;
using namespace std;
int n;
string s, last;
vector <char> ans;

struct Node{
	int ed;
	Node* child[30];
	Node(){ 
		ed = 0;
		f(i,0,29) child[i] = nullptr; 
	}
};

struct Trie{
	Node *root;
	Trie(){ root = new Node;}
	void __up(string S){
		Node *it = root;
		for(auto ii : S){
			int j = (int) ii - 'a';
			if(!it->child[j]) it->child[j] = new Node;
			it = it->child[j];
		}
		it->ed = 1;
	}
	void dfs(Node* i1, int len, int ok){
		int Alast = ok ? (int) last[len] - 'a' : -1;
		if(i1->ed == 1) ans.pb('P');
		f(i,0,25){
			if(i == Alast || !i1->child[i]) continue;
			ans.pb('a'+i);
			dfs(i1->child[i],len+1,0);
			ans.pb('-');
		}
		if(ok){
			ans.pb(last[len]);
			if(len == last.size() - 1) ans.pb('P');
			else dfs(i1->child[Alast],len+1,1);
		}
	}
}lxv;



main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin>>n;
	f(i,1,n){
		cin>>s;
		lxv.__up(s);
		if(s.size() > last.size()) last = s;
	}
	lxv.dfs(lxv.root,0,1);
	cout<<ans.size()<<'\n';
	for(auto i: ans) cout<<i<<'\n';
}

Compilation message (stderr)

printer.cpp: In member function 'void Trie::dfs(Node*, int, int)':
printer.cpp:43:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |    if(len == last.size() - 1) ans.pb('P');
      |       ~~~~^~~~~~~~~~~~~~~~~~
printer.cpp: At global scope:
printer.cpp:51:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   51 | 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