Submission #384752

#	Time	Username	Problem	Language	Result	Execution time	Memory
384752		hivakarami	Type Printer (IOI08_printer)	C++14	100 / 100	179 ms	83180 KiB

printer

#include<bits/stdc++.h>
 
using namespace std;
 
typedef long long int ll;
typedef long double ld;
#define f first
#define s second
 
const int N = 5e5 + 100;
const ll mod = 998244353;
const ll inf = 1e9 + 10;

int node = 1;
bool mark[N], last[N];
deque<char> ans;
vector<pair<int, int>> adj[N];
int h[N], c[N][30], par[N];


void dfs(int u)
{
	if(mark[u])
		ans.push_back('P');
		
	int x2 = -1, t2 = -1;	
	for(auto it : adj[u])
	{
		int x = it.f, t = it.s;
		if(last[x])
		{
			x2 = x;
			t2 = t;
			continue;
		}
		
		ans.push_back(char(t+'a'));
		dfs(x);
	}
	
	if(x2 != -1)
	{
		ans.push_back(char(t2+'a'));
		dfs(x2);
	}
	
	ans.push_back('-');
	
}



inline void add(string s)
{
	int u = 0;
	
	while(h[u] != s.size())
	{
		int t = s[h[u]]-'a';
		if(c[u][t] == 0)
		{
			c[u][t] = node;
			adj[u].push_back({node, t});
			h[node] = h[u] + 1;
			par[node] = u;
			node++;
		}
		
		u = c[u][t];
	}
	
	mark[u] = true;
	return;
	
}

 
int main()
{
    ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0);	
	
	int n;
	cin >> n;
	for(int i = 0; i < n; i++)
	{
		string s;
		cin >> s;
		add(s);
	}
	
	int mx = 0;
	for(int i = 0; i < node; i++)
	{
		if(h[i] > h[mx])
			mx = i;
	}
	
	while(mx != 0)
	{
		last[mx] = true;
		mx = par[mx];
	}
	
	dfs(0);
	
	
	while(ans.size() && ans.back() == '-')
		ans.pop_back();
	
	cout << ans.size() << '\n';
	for(auto t : ans)
		cout << t << '\n';
	
	
		
	return 0;
}
 
/*
3
print
the
poem
*/

 

Compilation message (stderr)

printer.cpp: In function 'void add(std::string)':
printer.cpp:57:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |  while(h[u] != s.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