Submission #791219

#	Time	Username	Problem	Language	Result	Execution time	Memory
791219		dsyz	Crayfish scrivener (IOI12_scrivener)	C++17	100 / 100	432 ms	225472 KiB

scrivener

#include <bits/stdc++.h>
#include <ext/rope>
using namespace std;
using namespace __gnu_cxx;
using ll = long long;
#define MAXN (1000005)
rope<char> r[MAXN];
ll ind = 0;
void Init(){
	ind = 0;
	r[0] = "";
}

void TypeLetter(char L) {
	ind++;
	r[ind] = r[ind - 1] + L;
}

void UndoCommands(int U) {
	ind++;
	r[ind] = r[ind - U - 1];
}

char GetLetter(int P) {
	return r[ind][P];
}

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