Submission #63034

#	Time	Username	Problem	Language	Result	Execution time	Memory
63034		Bodo171	Crayfish scrivener (IOI12_scrivener)	C++14	60 / 100	1043 ms	69720 KiB

scrivener

char last;

void Init() {}
const int nmax=1000005;
char st[nmax];
int lev[nmax],state[nmax],tt[nmax][20];
int curr,states,nr,i,lg=19;
void TypeLetter(char L) {

  curr=state[states];
  st[++nr]=L;state[++states]=nr;
  tt[nr][0]=curr;lev[nr]=lev[curr]+1;
  for(i=1;i<=lg;i++)
    tt[nr][i]=tt[tt[nr][i-1]][i-1];
}

void UndoCommands(int U) {
  states++;
  state[states]=state[states-U-1];
}

char GetLetter(int P) {
  curr=state[states];
  P=lev[curr]-P-1;
  for(i=lg;i>=0;i--)
       if(((1<<i)&P))
         curr=tt[curr][i];
  return st[curr];

}

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