Submission #1262771

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262771		tminh	Type Printer (IOI08_printer)	C++20	100 / 100	107 ms	99220 KiB

printer

#include "bits/stdc++.h"
using namespace std;

#define task ""
#define ll long long
#define endl '\n'
#define fi first
#define se second
#define vall(a) (a).begin(), (a).end()
#define sze(a) (int)a.size()
#define pii pair<int, int>
#define pll pair<ll, ll>


#define ep emplace_back
#define pb push_back
#define pf push_front


const ll mod = 1e9 + 7;
const int N = 1e5 + 5;
const ll oo = 1e18;

bool START;

struct node {
	node *child[26];
	int need, depth;
	node() {
		for (int i = 0; i < 26; ++i) child[i] = nullptr;
		need = depth = 0;
	}
};

node* root = new node();
int n;

void add(const string s) {
	node* p = root;
	for (char ch : s) {
		if (p->child[ch - 'a'] == nullptr) p->child[ch - 'a'] = new node();
		p = p->child[ch - 'a'];
		p->depth = max(p->depth, sze(s));
	}
	++p->need;
}

string ans = "";

void dfs(node* u) {
	for (int i = 1; i <= u->need; ++i) ans += 'P';
	vector<pii> adj;
	for (int i = 0; i < 26; ++i) {
		if (u->child[i] == nullptr) continue;
		adj.pb(make_pair(u->child[i]->depth, i));
	}
	sort(vall(adj));
	for (auto [d, i] : adj) {
		ans += char(i + 'a');
		dfs(u->child[i]);
		ans += '-';
	}
}

inline void solve() {
	dfs(root);
	while(!ans.empty() && ans.back() == '-') ans.pop_back();
	cout << sze(ans) << endl;
	for (char ch : ans) cout << ch << endl; 
}


string s;
inline void input() {
    cin >> n;
    while(n--) {
    	cin >> s;
    	add(s);
    }
    return solve();
}
bool END;

int main() {
    if(fopen(task ".inp", "r")) {
        freopen(task ".inp", "r", stdin);
        freopen(task ".out", "w", stdout);
    }
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr); cout.tie(nullptr);

    input();
    
    
    cerr << "Time elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << 's' << endl;
    cerr << "Memory: " << fabs ((&END - &START)) / 1048576.0 << "MB\n";
    return 0;
}

Compilation message (stderr)

printer.cpp: In function 'int main()':
printer.cpp:86:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   86 |         freopen(task ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
printer.cpp:87:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |         freopen(task ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• 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