Submission #900194

#	Time	Username	Problem	Language	Result	Execution time	Memory
900194		_uros9	Type Printer (IOI08_printer)	C++17	100 / 100	136 ms	126556 KiB

printer

#include <bits/stdc++.h>
#define endl '\n'
#define int long long

using namespace std;

const long long longlongmax=9223372036854775807;
const int modul=998244353;
const long long mod = 1e9 + 7;

int N=25000*20+9;
vector<char> rez(0);
vector<bool> kraj(N,0),drugi_krug(N,0);
vector<vector<int>> trie(N,vector<int>(26,0));
string odabrana;
int ind_c=0;
void ubaci(string&rec){
    int node=0;
    for(auto&x:rec){
        int c=x-'a';
        if(!trie[node][c]) trie[node][c]=++ind_c;
        node=trie[node][c];
    }
    kraj[node]=true;
    if(rec==odabrana){
        node=0;
        for(auto&x:rec){
            int c=x-'a';
            node=trie[node][c];
            drugi_krug[node]=true;
        }
    }
}
void dfs1(int node){
    if(kraj[node])
        rez.push_back('P');
    bool ok=false;
    for(auto x:trie[node]){
        if(x)
            ok=true;
    }
    if(!ok) {rez.push_back('-');return;}
    for(int i=0; i<26; i++){
        if(!trie[node][i]) continue;
        if(drugi_krug[trie[node][i]]) continue;
        rez.push_back('a'+i);
        dfs1(trie[node][i]);
    }
    if(node)
        rez.push_back('-');
    return;
}
void dfs2(int node,int ind,int odstup){
    if(kraj[node])
        rez.push_back('P');
    bool ok=false;
    for(auto x:trie[node]){
        if(x)
            ok=true;
    }
    if(!ok){rez.push_back('-');return;}
    for(int i=0; i<26; i++){
        if(!trie[node][i]) continue;
        if(!odstup&&i==(odabrana[ind]-'a')) continue;
        rez.push_back('a'+i);
        dfs2(trie[node][i],ind,odstup+1);
    }
    if(!odstup){
        rez.push_back(odabrana[ind]);
        dfs2(trie[node][odabrana[ind]-'a'],ind+1,odstup);
    }
    if(node)
        rez.push_back('-');
    return;
}

signed main()
{

    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    //freopen("factory.in","r",stdin);
    //freopen("factory.out","w",stdout);

    int n;
    cin >> n;
    int maxsiz=0;
    vector<string> niz(0);
    for(int i=0; i<n; i++){
        string rec;
        cin >> rec;
        niz.push_back(rec);
        if(maxsiz<rec.size()){
            odabrana=rec;
            maxsiz=rec.size();
        }
    }
    for(auto&x:niz)
        ubaci(x);
    dfs1(0);
    rez.push_back(odabrana[0]);
    dfs2(trie[0][odabrana[0]-'a'],1,0);
    while(rez.back()=='-')
        rez.pop_back();
    cout << rez.size() << endl;
    for(auto&x:rez)
        cout << x << endl;

    return 0;
}

Compilation message (stderr)

printer.cpp: In function 'int main()':
printer.cpp:95:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |         if(maxsiz<rec.size()){
      |            ~~~~~~^~~~~~~~~~~

• 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