Submission #292429

#	Time	Username	Problem	Language	Result	Execution time	Memory
292429		couplefire	Type Printer (IOI08_printer)	C++17	80 / 100	1094 ms	37112 KiB

printer

#include <bits/stdc++.h>
using namespace std;
#define MAXN 25005

vector<pair<int, char>> adj[20*MAXN];
int dp1[MAXN*20], dp2[MAXN*20];
int ans[MAXN*20];
int n;
int cur = 0;
pair<int, char> nodes[MAXN*20];
string ts;
int cnt = 0;

void addWord(int v, int p, int index){
    if(index == ts.length()){
        adj[v].push_back({++cur, 'P'});
        adj[cur].push_back(nodes[v]);
        nodes[cur] = {cur, 'P'};
        return;
    }
    bool flag = false;
    for(auto u : adj[v]){
        if(p == u.first) continue;
        if(u.second == ts[index]){
            flag = true;
            addWord(u.first, v, index+1);
        }
    }
    if(!flag){
        adj[v].push_back({++cur, ts[index]});
        adj[cur].push_back(nodes[v]);
        nodes[cur] = {cur, ts[index]};
        addWord(cur, v, index+1);
    }
}

void calc(int v, int p){
    dp1[v] = dp2[v] = 0;
    ans[v] = v;
    int mi = 1000000000, mindex = -1;
    for(auto u : adj[v]){
        if(u.first == p){
            continue;
        }
        calc(u.first, v);
        dp1[v] += dp1[u.first]+2;
        if(dp2[u.first]-dp1[u.first] < mi){
            mi = dp2[u.first]-dp1[u.first];
            mindex = u.first;
        }
    }
    dp2[v] = dp1[v];
    if(mi == 1000000000) return;
    ans[v] = mindex;
    dp2[v] = dp2[v]+mi-1;
}

void getAns(int v, int p){
    char c;
    for(auto u : adj[v]){
        if(u.first == p) continue;
        if(u.first == ans[v]){
            c = u.second;
            continue;
        }
        cout << u.second << endl;
        getAns(u.first, v);
        if(cnt != n && 0 <= u.second-'a' && u.second-'a' <= 25) cout << '-' << endl;
    }
    if(ans[v] != v){
        cout << c << endl;
        getAns(ans[v], v);
        if(cnt != n && 0 <= c-'a' && c-'a' <= 25) cout << '-' << endl;
    }
    else cnt++;
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    nodes[0] = {0, '?'};
    for(int i = 0; i<n; i++){
        cin >> ts;
        addWord(0, -1, 0);
    }
    calc(0, -1);
    cout << dp2[0]-n+1 << endl;
    getAns(0, -1);
}

Compilation message (stderr)

printer.cpp: In function 'void addWord(int, int, int)':
printer.cpp:15:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     if(index == ts.length()){
      |        ~~~~~~^~~~~~~~~~~~~~
printer.cpp: In function 'void getAns(int, int)':
printer.cpp:73:35: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
   73 |         if(cnt != n && 0 <= c-'a' && c-'a' <= 25) cout << '-' << endl;
      |            ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

• 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