#include <bits/stdc++.h> using namespace std; bool cmp(const string &s1, const string &s2) { return s1.size() < s2.size(); } int main() { int n; cin >> n; vector<string> words(n); vector<bool> printed(n, false); vector<char> choices; vector<char> cprint; int pc = 0; for(auto &a : words) cin >> a; sort(words.begin(), words.end(), cmp); int itp = 0; while(pc != n) { while(cprint.size() != words[itp].size()) { choices.push_back(words[itp][cprint.size()]); cprint.push_back(words[itp][cprint.size()]); } choices.push_back('P'); pc++; if(pc == n) break; printed[itp] = true; int mx_prf = -1; int mx_id = -1; for(int i = 0; i < n; i++) { if(printed[i]) continue; int cnt = 0; for(int j = 0; j < min(words[i].size(), cprint.size()); j++) { if(words[i][j] == cprint[j]) cnt++; else break; } if(cnt > mx_prf) { mx_prf = cnt; mx_id = i; } } itp = mx_id; while(cprint.size() != mx_prf) { cprint.pop_back(); choices.push_back('-'); } } cout << choices.size() << '\n'; for(auto &c : choices) { cout << c << '\n'; } }

printer.cpp: In function 'int main()':
printer.cpp:32:30: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
   32 |             for(int j = 0; j < min(words[i].size(), cprint.size()); j++) {
      |                            ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
printer.cpp:42:29: warning: comparison of integer expressions of different signedness: 'std::vector<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |         while(cprint.size() != mx_prf) {
      |               ~~~~~~~~~~~~~~^~~~~~~~~