Submission #974424

#	Time	Username	Problem	Language	Result	Execution time	Memory
974424		lucri	Crayfish scrivener (IOI12_scrivener)	C++17	100 / 100	431 ms	133540 KiB

scrivener

#include<bits/stdc++.h>
struct caracter{int poz;char x;caracter *t[20];}*ans[1000010];
int nr;
void Init()
{
    ans[0]=new caracter;
    ans[0]->poz=-1;
    ans[0]->x=0;
    for(int i=0;i<20;++i)
        ans[0]->t[i]=ans[0];
    return;
}
void TypeLetter(char L)
{
    ++nr;
    ans[nr]=new caracter;
    ans[nr]->poz=ans[nr-1]->poz+1;
    ans[nr]->x=L;
    ans[nr]->t[0]=ans[nr-1];
    for(int i=1;i<20;++i)
        ans[nr]->t[i]=ans[nr]->t[i-1]->t[i-1];
}
void UndoCommands(int U)
{
    ++nr;
    ans[nr]=ans[nr-U-1];
}
char GetLetter(int P)
{
    caracter *ansac=ans[nr];
    for(int i=0;i<20;++i)
    {
        if((1<<i)&(P-ansac->poz))
            ansac=ansac->t[i];
    }
    return ansac->x;
}

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