Submission #550913

#	Time	Username	Problem	Language	Result	Execution time	Memory
550913		Jomnoi	Type Printer (IOI08_printer)	C++17	20 / 100	42 ms	52804 KiB

printer

#include <bits/stdc++.h>
#define DEBUG false
using namespace std;

vector <char> ans;

class Node {
public :
	bool finish;
	int len[26];
	Node *c[26];
	Node() : finish(false) {
		for(int i = 0; i < 26; i++) {
			c[i] = NULL;
			len[i] = 0;
		}
	}
};

void add(Node *node, string s, int idx = 0) {
	if(idx == s.length()) {
		node->finish = true;
		return;
	}

	int v = s[idx] - 'a';
	if(node->c[v] == NULL) {
		node->c[v] = new Node();
	}

	node->len[v] = max(node->len[v], (int)s.length());
	add(node->c[v], s, idx + 1);
}

void solve(Node *node) {
	if(node->finish == true) {
		ans.push_back('P');
		return;
	}

	vector <pair <int, int>> vec;
	for(int v = 0; v < 26; v++) {
		if(node->c[v] != NULL) {
			vec.emplace_back(node->len[v], v);
		}
	}

	sort(vec.begin(), vec.end());

	for(auto [l, v] : vec) {
		ans.push_back(v + 'a');
		solve(node->c[v]);
		ans.push_back('-');
	}
}

int main() {
	cin.tie(nullptr)->sync_with_stdio(false);
	int N;
	cin >> N;
	Node *root = new Node();
	for(int i = 1; i <= N; i++) {
		string s;
		cin >> s;
		add(root, s);
	}

	solve(root);

	while(ans.back() == '-') {
		ans.pop_back();
	}

	cout << ans.size() << '\n';
	for(auto c : ans) {
		cout << c << '\n';
	}
	return 0;
}

Compilation message (stderr)

printer.cpp: In function 'void add(Node*, std::string, int)':
printer.cpp:21:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  if(idx == s.length()) {
      |     ~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10