Submission #251648

#	Time	Username	Problem	Language	Result	Execution time	Memory
251648		tinjyu	Crayfish scrivener (IOI12_scrivener)	C++14	34 / 100	1100 ms	243612 KiB

scrivener

#include <iostream>
using namespace std;
char last;

void Init() {}
string s[1000005];
string ans;
char c[1000005],ad[1000005];
int num[1000005];
long long int p;
void TypeLetter(char L) {
	p++;
	if(p<10000)
	{
		s[p]=s[p-1]+L;
	}
	
	c[p]='a';
	ad[p]=L;
	//cout<<s[p]<<endl;
}

void UndoCommands(int U) {
	p++;
	if(p<10000)s[p]=s[p-U-1];
	
	c[p]='b';
	num[p]=U;
	//cout<<s[p]<<endl;
}

char GetLetter(int P) {
	if(p<10000)return s[p][P];
	if(ans=="")
	{
		for(int i=p;i>=1;i--)
		{
			if(c[p]=='a')ans=ad[p]+ans;
			else
			{
				i-=num[p];
			}
		}
	}
	return ans[P];
}

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