Submission #547122

#	Time	Username	Problem	Language	Result	Execution time	Memory
547122		oToToT	Crayfish scrivener (IOI12_scrivener)	C++17	5 / 100	415 ms	262144 KiB

scrivener

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

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