제출 #546876

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
546876		ussef_abdallah	Type Printer (IOI08_printer)	C++14	10 / 100	47 ms	37148 KiB

printer

#include <bits/stdc++.h>

using namespace std;

const int ALPHABET_SIZE = 26;

class TrieNode {
public:
    TrieNode* children[ALPHABET_SIZE];
    bool isLeaf;

    TrieNode() {
        for (int i = 0; i < ALPHABET_SIZE; i++) {
            children[i] = nullptr;
        }
        isLeaf = false;
    }
    void insert(string &word) {
        for (char &c : word) {
            if (children[c - 'a'] == nullptr)
                children[c - 'a'] = new TrieNode();
            children[c - 'a'];
        }
    }
};

class Trie {
private:
    TrieNode* root;
public:
    Trie() {
        root = new TrieNode();
    }

    void insert(string &word) {
        TrieNode* cur = root;
        for (char &c : word) {
            if (cur->children[c - 'a'] == nullptr)
                cur->children[c - 'a'] = new TrieNode();
            cur = cur->children[c - 'a'];
        }
        cur->isLeaf = true;
    }

    void traverse(string &longest, vector<char> &ans) {
        dfs(root, longest, ans, 0);
    }

    void dfs(TrieNode* node, string &longest, vector<char> &ans, int pos) {
        if (node == nullptr)
            return;
        if (node->isLeaf)
            ans.push_back('P');
        for (int i = 0; i < ALPHABET_SIZE; i++) {
            if (node->children[i] != nullptr && i + 'a' != longest[pos]) {
                ans.push_back('a' + i);
                dfs(node->children[i], longest, ans, pos);
                ans.push_back('-');
            }
        }
        if (node->children[longest[pos] - 'a']) {
            ans.push_back(longest[pos]);
            dfs(node->children[longest[pos] - 'a'], longest,
                ans, pos + 1);
        }
    }
};

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector<string> a(n);
    string longest = "";
    Trie* trie = new Trie();
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
        if (a[i].length() > longest.length())
            longest = a[i];
        trie->insert(a[i]);
    }
    vector<char> ans;
    trie->traverse(longest, ans);
    cout << ans.size() << "\n";
    for (auto &c : ans) {
        cout << c << "\n";
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

printer.cpp: In member function 'void TrieNode::insert(std::string&)':
printer.cpp:22:29: warning: statement has no effect [-Wunused-value]
   22 |             children[c - 'a'];
      |             ~~~~~~~~~~~~~~~~^

• Subtask 1: 10 / 10
• Subtask 2: 0 / 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