Submission #169308

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
169308	2019-12-19T16:08:59 Z	AlexLuchianov	Crayfish scrivener (IOI12_scrivener)	C	Compilation error	0 ms	0 KB

scrivener

#include <iostream>

int const nmax = 1000000;

int far[20][1 + nmax], ptr = 0;
int level[1 + nmax];
char chr[1 + nmax];

void Init() {}

void TypeLetter(char L) {
  ++ptr;
  far[0][ptr] = ptr - 1;
  for(int h = 1; h < 20; h++)
    far[h][ptr] = far[h - 1][far[h - 1][ptr]];
  level[ptr] = level[far[0][ptr]] + 1;
  chr[ptr] = L;
}

void UndoCommands(int U) {
  ++ptr;
  far[0][ptr] = ptr - 1 - U;
  for(int h = 1; h < 20; h++)
    far[h][ptr] = far[h - 1][far[h - 1][ptr]];
  level[ptr] = level[far[0][ptr]];
}

char GetLetter(int P) {
  int pos = ptr;
  P++;
  for(int h = 19; 0 <= h; h--)
    if(P <= level[far[h][pos]] )
      pos = far[h][pos];
  return chr[pos];
}

Compilation message

scrivener.c:1:10: fatal error: iostream: No such file or directory
 #include <iostream>
          ^~~~~~~~~~
compilation terminated.