Submission #439463

#	Time	Username	Problem	Language	Result	Execution time	Memory
439463		ldn694	Type Printer (IOI08_printer)	C++17	100 / 100	168 ms	101116 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, longest;
struct Node
{
    Node *child[26];
    bool tail;
    Node()
    {
        fu(i, 0, 25) child[i] = NULL;
        tail = false;
    }
};
Node *root;
void Insert(const string &a)
{
    Node *p = root;
    for (char x : a)
    {
        int v = int(x) - 97;
        if (p->child[v] == NULL) p->child[v] = new Node();
        p = p->child[v];
    }
    p->tail = true;
}
void DFS(Node *u, int depth, bool still)
{
    int c = int(longest[depth]) - 97;
    fu(i, 0, 25)
    {
        if (u->child[i] == NULL) continue;
        if (i == c  && still) continue;
        res.push_back(char(i + 97));
        if (u->child[i]->tail) res.push_back('P');
        DFS(u->child[i], depth + 1, false);
        res.push_back('-');
    }
    if (still)
    {
        res.push_back(longest[depth]);
        if (u->child[c]->tail) res.push_back('P');
        if (depth < (int)longest.size() - 1 && u->child[c] != NULL) DFS(u->child[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];
    }
    root = new Node();
    fu(i, 1, n)
    {
        Insert(a[i]);
    }
    longest = a[1];
    fu(i, 2, n)
    {
        if (longest.size() < a[i].size()) longest = a[i];
    }
    DFS(root, 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