oj.uz

Submission #515835

# Submission time Handle Problem Language Result Execution time Memory
515835 2022-01-19T21:11:21 Z mhsi2005 Type Printer (IOI08_printer) C++17
70 / 100
 180 ms 51228 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template <class T> using indexed_set = tree<T, null_type, less<T>,
	rb_tree_tag, tree_order_statistics_node_update>;

#define watch(x) cerr << "{" << (#x) << " = " << x << "}" << '\n';
#define watch2(x, y) cerr << "{" << (#x) << " = " << x << ", " << (#y) << " = " << y << "}" << '\n';
#define watch3(x, y, z) cerr << "{" << (#x) << " = " << x << ", " << (#y) << " = " << y << ", " << (#z) << " = " << z << "}" << '\n';
#define fast_io ios::sync_with_stdio(false); cin.tie(0), cout.tie(0);

const ll maxn = 4e5 + 10;

int n, t[maxn][30], nodes = 1;
set<int> en;
vector<char> ans;

void add (string &s)
{
	int v = 0;
	for (int i = 0; i < s.size(); i++) {
		if (!t[v][s[i] - 'a']) t[v][s[i] - 'a'] = nodes++;
		v = t[v][s[i] - 'a'];
	}
	en.insert(v);
}

vector<int> lasts;

void dfs (int v)
{
	if (en.count(v)) {
		ans.push_back('P');
		en.erase(v);
	}
	int i = -1;
	for (int x = 0; x < 27; x++) {
		if (t[v][x]) {
			if (t[v][x] == lasts.back()) {i = x; continue;}
			ans.push_back((char)('a' + x));
			dfs(t[v][x]);
		}
	}

	if (i != -1) {
		ans.push_back((char)('a' + i));
		lasts.pop_back();
		dfs(t[v][i]);
	}
	if (en.size())
		ans.push_back('-');
}

vector<int> ss;
int degree[maxn];
pair<int, int> dp[maxn];

void dfs2 (int v)
{
	for (int i = 0; i < 27; i++) {
		int u = t[v][i];
		if (!u) continue;
		dfs2(u);
		degree[v]++;
		int res = dp[u].first + (degree[u] <= 1);
		if (dp[v].first < res) {
			dp[v].first = res;
			dp[v].second = u;
		}
	}
}

int main ()
{
	cin >> n;

	for (int i = 0; i < n; i++) {
		string s;
		cin >> s;
		add(s);
	}

	dfs2(0);
	int v = 0;
	while (dp[v].second) {
		v = dp[v].second;
		lasts.push_back(v);
	}
	reverse(lasts.begin(), lasts.end());
	dfs(0);

	cout << ans.size() << '\n';
	for (char c : ans)
		cout << c << '\n';

	return 0;
}

Compilation message

printer.cpp: In function 'void add(std::string&)':
printer.cpp:26:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |  for (int i = 0; i < s.size(); i++) {
      |                  ~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 1 ms 204 KB Output is correct

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 2 ms 716 KB Output is correct

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 1228 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 3788 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 34 ms 9424 KB Output is correct
2 Correct 15 ms 2624 KB Output is correct

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 87 ms 22908 KB Output is correct
2 Correct 180 ms 51228 KB Output is correct
3 Correct 87 ms 27280 KB Output is correct

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 64 ms 18456 KB Output isn't correct
2 Halted 0 ms 0 KB -