Submission #547123

#	Time	Username	Problem	Language	Result	Execution time	Memory
547123		oToToT	Crayfish scrivener (IOI12_scrivener)	C++17	100 / 100	506 ms	227864 KiB

scrivener

#include <ext/rope>
 
int cnt;
__gnu_cxx::crope a[1000001];
 
void Init() { cnt = 0; }
void TypeLetter(char c) { cnt++, a[cnt] = a[cnt - 1] + c; }
void UndoCommands(int k) { cnt++, a[cnt] = a[cnt - k - 1]; }
char GetLetter(int k){ return a[cnt][k]; }

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