Submission #439451

#	Time	Username	Problem	Language	Result	Execution time	Memory
439451		ldn694	Type Printer (IOI08_printer)	C++17	100 / 100	129 ms	52412 KiB

printer

#include <bits/stdc++.h>
#define fu(i, a, b) for (int i = a; i <= b; i++)
#define fd(i, a, b) for (int i = a; i >= b; i--)
using namespace std;
const int N = 25e3 + 10;
const int M = 5e5 + 10;
int n;
string a[N], res;
int trie[M][27], sz = 0;
bool tail[M];
string longest;
void Insert(const string &a)
{
    int node = 0;
    for (char c : a)
    {
        int x = int(c) - 96;
        if (!trie[node][x]) trie[node][x] = ++sz;
        node = trie[node][x];
    }
    tail[node] = true;
}
void DFS(int u, int depth, bool still)
{
    int c = int(longest[depth]) - 96;
//    cout << u << " " << depth << "\n";
    fu(i, 1, 26)
    {
        if (trie[u][i] == 0) continue;
        if (i == c  && still) continue;
//        cout << char(i + 96) << "\n";
        res.push_back(char(i + 96));
        if (tail[trie[u][i]])
        {
//            cout << "P\n";
            res.push_back('P');
        }
        DFS(trie[u][i], depth + 1, false);
//        cout << "-\n";
        res.push_back('-');
    }
    if (still)
    {
//        cout << longest[depth] << "\n";
        res.push_back(longest[depth]);
        if (tail[trie[u][c]]) res.push_back('P');
        if (depth < (int)longest.size() - 1 && trie[u][c]) DFS(trie[u][c], depth + 1, still);
    }
}
int main()
{
    cin.tie(NULL);
    cout.tie(NULL);
    ios_base::sync_with_stdio(false);
    cin >> n;
    fu(i, 1, n)
    {
        cin >> a[i];
    }
    fu(i, 1, n)
    {
        Insert(a[i]);
    }
    longest = a[1];
    fu(i, 2, n)
    {
        if (longest.size() < a[i].size()) longest = a[i];
    }
    DFS(0, 0, 1);
    cout << (int)res.size() << "\n";
    fu(i, 0, (int)res.size() - 1)
    {
        cout << res[i] << "\n";
    }
}

• 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