Submission #855090

#	Time	Username	Problem	Language	Result	Execution time	Memory
855090		vjudge1	Type Printer (IOI08_printer)	C++17	100 / 100	998 ms	50188 KiB

printer

#include <bits/stdc++.h>
using namespace std;
const int NN = 1e6 + 10;
#define _for(i, a, b) for(int i = (a); i <= (b); ++i)
bool ED[NN], K[NN];
char L[NN];
int TR[NN][26], N, cnt, num;
string ans;
void insert(string &s){
    int p = 0;
    for(int i = 0; s[i]; ++i){
        int x = s[i] - 'a';
        if(!TR[p][x]) TR[p][x] = ++cnt;
        L[TR[p][x]] = x + 'a', p = TR[p][x];
    }
    ED[p] = 1;
}
void mark(string &s){
    int p = 0;
    for(int i = 0; s[i]; i++){
        int x = s[i] - 'a';
        K[TR[p][x]] = 1, p = TR[p][x];
    }
}
void dfs(int x){
    if(ED[x] == 1 && x != 0) ++num, ans += "P";
    if(num == N){
        cout << ans.size() << endl;
        for(int i = 0; ans[i]; ++i) cout << ans[i] << endl;
        return;
    }
    int u;
    _for(i, 0, 25){
        u = TR[x][i];
        if(K[u] == 0 && u != 0) ans += L[u], dfs(u), ans += "-";
    }
    _for(i, 0, 25){
        u = TR[x][i];
        if(K[u] && u) ans += L[u], dfs(u), ans += "-";
    }
}
int main(){
	ios::sync_with_stdio(false), cin.tie(0);
    cin >> N;
    string s, l;
    _for(i, 1, N){
        cin >> s, insert(s);
        if(l.size() < s.size()) l = s;
    }
    mark(l), dfs(0);
    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