Submission #328674

#	Time	Username	Problem	Language	Result	Execution time	Memory
328674		aris12345678	Type Printer (IOI08_printer)	C++14	100 / 100	198 ms	104160 KiB

printer

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pi pair<int, int>
#define fi first
#define se second

const int mxN = 1e5+5;
const int mod = 1e9+7;
const ll inf = 1e18;

struct node {
    bool word;
    int depth;
    node *children[26];
    node() {
        word = 0, depth = 0;
        for(int i = 0; i < 26; i++) children[i] = nullptr;
    }
}; node *root = new node();

int n;
string s[mxN];
vector<char> ans;

// insert t
void add(string t) {
    int len = t.length();
    node *cur = root;
    for(int i = 0; i < len; i++) {
        cur->depth = max(cur->depth, len);
        if(cur->children[t[i]-'a'] == nullptr) cur->children[t[i]-'a'] = new node();
        cur = cur->children[t[i]-'a'];
    }
    cur->depth = max(cur->depth, len);
    cur->word = 1;
}

// dfs in a trie starting from the root
void dfs(node *u, int back) {
    if(u->word) ans.push_back('P'); // red vertice - end of the word
    int p = 0;
    node *x = nullptr;
    for(int i = 0; i < 26; i++) {
        node *v = u->children[i];
        if(v == nullptr) continue;
        if(x == nullptr || v->depth > x->depth) { x = v; p = i; }
    }
    for(int i = 0; i < 26; i++) {
        node *v = u->children[i];
        if(v == x || v == nullptr) continue;
        ans.push_back(i+'a');
        dfs(v, 0);
    }
    if(x != nullptr) { ans.push_back(p+'a'); dfs(x, back); }
    if(!back) ans.push_back('-');
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    for(int i = 0; i < n; i++) {
        cin >> s[i];
        add(s[i]);
    }
    dfs(root, 1);
    cout << ans.size() << "\n";
    for(char i : ans) cout << i << "\n";
    return 0;
}

• 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