Submission #676658

#	Time	Username	Problem	Language	Result	Execution time	Memory
676658		QwertyPi	Type Printer (IOI08_printer)	C++14	90 / 100	1018 ms	62404 KiB

printer

#include <bits/stdc++.h>

using namespace std;

const int SIGMA = 26; 
int ncnt = 0;
struct node{
	int nxt[SIGMA] = {};
	bool word = false;
	int heavy = -1; 
	node() {}
	int extend(int c){
		if(!nxt[c]) nxt[c] = ++ncnt;
		return nxt[c];
	}
	int extend_heavy(int c){
		heavy = c;
		return nxt[c];
	}
};

const int MAXN = 25011;
node trie[MAXN * 21];

string ans;
void dfs(int root){
	if(trie[root].word) ans.push_back('P');
	for(int c = 0; c < SIGMA; c++){
		if(trie[root].nxt[c] && trie[root].heavy != c){
			ans.push_back('a' + c);
			dfs(trie[root].nxt[c]);
			ans.push_back('-');
		}
	}
	if(trie[root].heavy != -1){
		ans.push_back('a' + trie[root].heavy);
		dfs(trie[root].nxt[trie[root].heavy]);
		ans.push_back('-');
	}
}

int root = 0;
int main(){
	cin.tie(0); cout.tie(0)->sync_with_stdio(false);
	int n; cin >> n;
	vector<string> vs;
	for(int i = 0; i < n; i++){
		string s; cin >> s;
		vs.push_back(s);
		int x = root;
		for(auto c : s){
			x = trie[x].extend(c - 'a');
		}
		trie[x].word = true;
	}
	
	int idx = 0;
	for(int i = 1; i < n; i++){
		if(vs[i].size() > vs[idx].size()){
			idx = i;
		}
	}
	{
		int x = root;
		for(auto c : vs[idx]){
			x = trie[x].extend_heavy(c - 'a');
		}
	}
	dfs(root);
	while(ans.back() == '-') ans.pop_back();
	cout << ans.size() << endl;
	for(auto c : ans) cout << c << endl;
}

• 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: 0 / 10