Submission #62569

#	Time	Username	Problem	Language	Result	Execution time	Memory
62569		zetapi	Crayfish scrivener (IOI12_scrivener)	C++14	60 / 100	1082 ms	68772 KiB

scrivener

const int MAX=1e6+5;

char X[MAX];

int ind,tot,arr[MAX],height[MAX],Parent[MAX][22];

void Init()
{
	return ;
}

void TypeLetter(char L) 
{
	X[++ind]=L;
	Parent[ind][0]=arr[tot++];
	height[ind]=height[Parent[ind][0]]+1;
	for(int A=1;A<20;A++)
		Parent[ind][A]=Parent[Parent[ind][A-1]][A-1];
	arr[tot]=ind;
	return ;
}

void UndoCommands(int U) 
{
    ++tot;
	arr[tot]=arr[tot-U-1];
	return ;
}

char GetLetter(int P) 
{
	int res=arr[tot];
	for(int A=19;A>=0;A--)
	{
		if(height[Parent[res][A]]>P)
			res=Parent[res][A];
	}
	return X[res];
}

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 22 / 22
• Subtask 4: 26 / 26
• Subtask 5: 0 / 40