Submission #107465

#	Time	Username	Problem	Language	Result	Execution time	Memory
107465		tictaccat	Type Printer (IOI08_printer)	C++14	100 / 100	226 ms	76392 KiB

printer

#include <bits/stdc++.h>

using namespace std;

const int MAX = 25000 + 10;

int N;
vector<string> words;
string longest;

vector<vector<int>> trie(20*MAX,vector<int>(26));
vector<int> hasString(20*MAX);
int c = 0; //current max node in tree

ostringstream oss;
int ops;

void insert (const string &s) {
    int u = 0; 
    for (int i = 0; i < s.size(); i++) {
        if (trie[u][s[i]-'a']) u = trie[u][s[i]-'a'];
        else u = trie[u][s[i]-'a'] = ++c;
    }
    hasString[u] = true;
}

void dfs(int u, int adv) {
    if (hasString[u]) {
        ops++;
        oss << "P\n";
    }
    if (adv == longest.size()) {
        cout << ops << "\n" << oss.str();
        exit(0);
    }
    for (int c = 0; c < 26; c++) {
        if (c == longest[adv]-'a') continue;
        if (trie[u][c]) {
            ops++;
            oss << (char)('a'+c) << "\n";
            dfs(trie[u][c],adv);
        }
    }
    if (trie[u][longest[adv]-'a']) {
        ops++;
        oss << longest[adv] << "\n";
        dfs(trie[u][longest[adv]-'a'],adv+1);
    }
    ops++;
    oss << "-\n";
}

int main() {

    cin.tie(0);
    ios::sync_with_stdio(false);

    cin >> N;

    for (int i = 0; i < N; i++) {
        string w; cin >> w;
        words.push_back(w);
        insert(w);
    }

    longest = *max_element(words.begin(),words.end(),[](string a, string b) {return a.size() < b.size();});

    dfs(0,0);

    return 0;
}

Compilation message (stderr)

printer.cpp: In function 'void insert(const string&)':
printer.cpp:20:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < s.size(); i++) {
                     ~~^~~~~~~~~~
printer.cpp: In function 'void dfs(int, int)':
printer.cpp:32:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (adv == longest.size()) {
         ~~~~^~~~~~~~~~~~~~~~~

• 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