Submission #1026288

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026288		Nicolaikrob	Type Printer (IOI08_printer)	C++17	80 / 100	1083 ms	204724 KiB

printer

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")
#include <bits/stdc++.h>
using namespace std;

string lgst, s, O;
unordered_map<string, int> M;

void out() {
    cout << O.size() << '\n';
    for(auto x : O) cout << x << '\n';
    exit(0);
}

void dfs() {
    if(!M[s]) return;
    int ln = s.size();
    if(ln) O.push_back(s[ln-1]);
    if(M[s] == 2) O.push_back('P');
    for(int i = 'a'; i <= 'z'; i++) {
        if(i == lgst[ln]) continue;
        s += char(i);
        dfs();
        s.pop_back();
    }
    s += char(lgst[ln]);
    dfs();
    s.pop_back();
    if(s+'.' == lgst) out();
    O.push_back('-');
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n; cin >> n;
    vector<string> W(n); for(auto &x : W) cin >> x;
    int ml = 0;
    for(int i = 0; i < n; i++) {
        if(W[i].size() > ml) lgst = W[i], ml = W[i].size();
    }
    lgst += '.';
    for(int i = 0; i < n; i++) {
        string t = "";
        for(int j = 0; j < W[i].size(); j++) {
            t += W[i][j];
            M[t] = max(M[t], 1);
        }
        M[t] = 2;
    }
    M[""] = 1;
    s = "";
    dfs();
}

Compilation message (stderr)

printer.cpp: In function 'int main()':
printer.cpp:40:24: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |         if(W[i].size() > ml) lgst = W[i], ml = W[i].size();
      |            ~~~~~~~~~~~~^~~~
printer.cpp:45:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         for(int j = 0; j < W[i].size(); j++) {
      |                        ~~^~~~~~~~~~~~~

• 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: 0 / 10
• Subtask 10: 0 / 10