Submission #930904

#	Time	Username	Problem	Language	Result	Execution time	Memory
930904		woofes	Type Printer (IOI08_printer)	C++17	100 / 100	82 ms	57804 KiB

printer

// #pragma GCC optimize("O3")
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int cnt_s = 26;

struct node {
    bool val;
    int lnk[cnt_s];
    node() {
        val = false;
        for (int i = 0; i < cnt_s; i++) {
            lnk[i] = -1;
        }
    }
};

vector<node> trie(1);

void add(string& s) {
    int v = 0;
    for (char c : s) {
        int u = trie[v].lnk[c - 'a'];
        if (u == -1) {
            u = trie.size();
            trie.emplace_back();
            trie[v].lnk[c - 'a'] = u;
        }
        v = u;
    }
    trie[v].val = true;
}

vector<char> res;
string s1;
int j = 0;
bool is_ob = true;

void get_way(int v) {
    if (is_ob) {
        if (j >= (int)s1.size()) {
            res.push_back('P');
            is_ob = false;
            return;
        }
        int u = trie[v].lnk[s1[j] - 'a'];
        trie[v].lnk[s1[j++] - 'a'] = -1;
        get_way(u);
        res.push_back(s1[--j]);
    }

    if (trie[v].val) {
        res.push_back('P');
    }

    for (int i = 0; i < cnt_s; i++) {
        int el = trie[v].lnk[i];
        if (el != -1) {
            res.push_back('-');
            get_way(el);
            res.push_back('a' + i);
        }
    }
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr);
    // freopen("input.txt", "r", stdin);
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        string s;
        cin >> s;
        add(s);
        if (s.size() > s1.size()) {
            s1 = s;
        }
    }
    get_way(0);
    reverse(res.begin(), res.end());
    cout << res.size() << "\n";
    for (char el : res) {
        cout << el << "\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