Submission #900655

#	Time	Username	Problem	Language	Result	Execution time	Memory
900655		vanea	Type Printer (IOI08_printer)	C++14	30 / 100	66 ms	40400 KiB

printer

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

const int mxN = 5e5+10;

int trie[mxN][26];
int cnt = 0;
bool stop[mxN];
string alpha = "abcdefghijklmnopqrstuvwxyz";

void insert(string s) {
    int node = 0;
    for(auto c : s) {
        if(trie[node][c-'a'] == 0) trie[node][c-'a'] = ++cnt;
        node = trie[node][c-'a'];
    }
    stop[node] = true;
}

vector<char> ans;

void dfs(int node) {
    if(stop[node]) ans.push_back('P');
    for(auto c : alpha) {
        int k = trie[node][c-'a'];
        if(k) {
            ans.push_back(c);
            dfs(k);
            ans.push_back('-');
        }
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    for(int i = 0; i < n; i++) {
        string s;
        cin >> s;
        insert(s);
    }
    dfs(0);
    int curr = 0, mx = 0, idx;
    for(int i = 0; i < ans.size(); i++) {
        if(ans[i] == '-') curr++;
        else {
            if(curr > mx) {
                mx = curr;
                idx = i;
            }
            curr = 0;
        }
    }
    if(curr > mx) {
        mx = curr;
        idx = ans.size();
    }
    cout << ans.size() - mx << '\n';
    for(int i = idx; i < ans.size(); i++) {
        cout << ans[i] << '\n';
    }
    for(int i = 0; i < idx-mx; i++) {
        cout << ans[i] << '\n';
    }
    return 0;
}

Compilation message (stderr)

printer.cpp: In function 'int main()':
printer.cpp:48:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |     for(int i = 0; i < ans.size(); i++) {
      |                    ~~^~~~~~~~~~~~
printer.cpp:63:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(int i = idx; i < ans.size(); i++) {
      |                      ~~^~~~~~~~~~~~
printer.cpp:66:27: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   66 |     for(int i = 0; i < idx-mx; i++) {
      |                        ~~~^~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10