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Submission #76868

# Submission time Handle Problem Language Result Execution time Memory
76868 2018-09-18T19:18:14 Z FiloSanza Crayfish scrivener (IOI12_scrivener) C++14
0 / 100
 3 ms 1060 KB 
#include <bits/stdc++.h>

using namespace std;

const int MAX_LOG = 20;
const int MAX_SIZE = 15;
struct Node{
	char val;
	int depth;
	vector<Node*> figli;
	Node* father[MAX_LOG];

	Node(char val, int depth) : val(val), depth(depth){
		figli.resize(MAX_SIZE, nullptr);
		for(int i=0; i<MAX_LOG; i++)
			father[i] = nullptr;
	}
	Node(char val, int depth, Node* N) : val(val), depth(depth){
		figli.resize(MAX_SIZE, nullptr);
		father[0] = N;
		for(int i=1; i<MAX_LOG; i++)
			if(father[i-1] != nullptr)
				father[i] = father[i-1]->father[i-1];
			else
				father[i] = nullptr;
	}
};

struct Trie{
	Node *root = nullptr;
	vector<Node *> version;
	int curr = 0;
	//costruttore
	Trie(){
		root = new Node('\0', -1);
		version.push_back(root);
	}

	char getKth(int k){
		Node* node = version[curr];
		int L = node->depth - k;
		for(int i=0; (1<<i)<=L; i++)if(L&(1<<i)){
			node = node->father[i];
		}

		return node->val;
	}
	//Devo aggiungere nell'ultima versione il carattere(New Node se non esiste) e aggiungere una versione
	void insert(char c){
		int val = c - 'a';
		int h = version[curr]->depth+1;
		//Non esiste, lo creo
		if(version[curr]->figli[val] == nullptr){
			version[curr]->figli[val] = new Node(c, h, version[curr]);
		}
		//aggiungo la nuova versione
		version.push_back(version[curr]->figli[val]);
		curr ++;
	}
	//Per tornare indietro di N versioni mi basta andare all'indice curr - k del vettore
	void goBack(int k){
		version.push_back(version[curr-k]);
		curr++;
	}

};

Trie t;

void Init() {}

void TypeLetter(char L) {
	t.insert(L);
}

void UndoCommands(int U) {
	t.goBack(U);
}

char GetLetter(int P) {
	return t.getKth(P);
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Runtime error 3 ms 504 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 556 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 708 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# Verdict Execution time Memory Grader output
1 Runtime error 3 ms 972 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #5
0 / 40.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 1060 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -