Submission #234541

#	Time	Username	Problem	Language	Result	Execution time	Memory
234541		crossing0ver	Crayfish scrivener (IOI12_scrivener)	C++17	Compilation error	0 ms	0 KiB

scrivener

#include<bits/stdc++.h>
using namespace std; 
int operations;
char lastchar[1000005];
int P[1000005][20],sz[1000005];
void init() {
	
	
}    

void TypeLetter(char L){
	operations++;
	P[operations][0] = operations - 1;
	sz[operations] = sz[operations - 1] + 1;
	for (int i = 1; i < 20; i ++)
		P[operations][i] = P[ P[operations][i-1] ][i-1];
	lastchar[operations] = L;
}

void UndoCommands(int U) {
	operations++;
	sz[operations] = sz[operations - 1 - U];
	P[operations][0] = P[operations - 1 - U][0];
	lastchar[operations]= lastchar[operations - 1 - U];
	
	for (int i = 1; i < 20; i ++)
		P[operations][i] = P[ P[operations][i-1] ][i-1];
}


char GetLetter(int P) {
	int x = sz[operations] - P - 1;
	int cur = operations;
	for (int i = 0; i < 20 ;i++) {
		if (x & i) {
			cur = P[cur][i];
		}
	}
	return lastchar[cur];
}

Compilation message (stderr)

scrivener.cpp: In function 'char GetLetter(int)':
scrivener.cpp:36:15: error: invalid types 'int[int]' for array subscript
    cur = P[cur][i];
               ^