Submission #68427

#	Time	Username	Problem	Language	Result	Execution time	Memory
68427		nvmdava	Crayfish scrivener (IOI12_scrivener)	C++17	34 / 100	1081 ms	6984 KiB

scrivener

#include <bits/stdc++.h>
using namespace std;
char s[1000001];
int now = 0, i = 0, dir[1000001], sz[1000001];
void Init() {}
 
void TypeLetter(char L) {
	s[i] = L;
	dir[i] = now;
	sz[i] = sz[now] + 1;
	now = i;
	i++;
}
 
void UndoCommands(int U) {
	now = i - U - 1;
	s[i] = s[now];
	dir[i] = dir[now];
	sz[i] = sz[now];
	i++;
}
 
char GetLetter(int P) {
	int j = i - 1;
	int t = sz[j] - P - 1;
	while(t--){
		j = dir[j];
	}
	return s[j];
}

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