Submission #63009

#	Time	Username	Problem	Language	Result	Execution time	Memory
63009		theknife2001	Crayfish scrivener (IOI12_scrivener)	C++17	Compilation error	0 ms	0 KiB

scrivener

#include <stdlib.h>
#include <stdio.h>
#include <assert.h>

#define inbuf_len 1 << 16
#define outbuf_len 1 << 16
#include <bits/stdc++.h>


using namespace std;
const int N=1e6+55;
int trie[N*2][26];
char letter[N];
int p[N][22];
int a[N];
int l[N];
int node;
int cnt=1;
int k=1;

void Init()
{
    node=cnt++;
}

int c,temp,nd;
void TypeLetter(char L)
{
    c=L-'a';
    temp=node;
    if(trie[node][c]==0)
        trie[node][c]=cnt++;
    node=trie[node][c];
    letter[node]=L;
    a[k]=node;
    l[k]=l[k-1]+1;
    if(p[node][0]==0)
    {
        p[node][0]=temp;
        for(int i=1;i<21;i++)
        {
            p[node][i]=p[p[node][i-1]][i-1];
            if(p[node][i]==0)
                break;
        }
    }
    k++;
}

void UndoCommands(int U)
{
    node=a[k-U-1];
    l[k]=l[k-U-1];
    a[k]=node;
    k++;
}
char GetLetter(int P)
{
    P=l[k-1]-P-1;
    nd=node;
    for(int i=20;i>=0;i--)
    {
        if((P&(1<<i)))
            nd=p[nd][i];
    }
    return letter[nd];
}


int main() {
  Init();

  int cmd_num;
  int tmp=1;
  tmp = scanf("%d", &cmd_num);
  assert(tmp == 1);

  int i;
  for (i = 0; i < cmd_num; i++) {
    char cmd;
    tmp = scanf(" %c", &cmd);
    assert(tmp == 1);
    if (cmd == 'T') {
      char letter;
      tmp = scanf(" %c", &letter);
      assert(tmp == 1);
      TypeLetter(letter);
    }
    else if (cmd == 'U') {
      int number;
      tmp = scanf("%d", &number);
      assert(tmp == 1);
      UndoCommands(number);
    }
    else if (cmd == 'P') {
      int index;
      char letter;
      tmp = scanf("%d", &index);
      assert(tmp == 1);
      letter = GetLetter(index);
      printf("%c\n", letter);
    }
  }

  return 0;

}

Compilation message (stderr)

/tmp/ccQ45AM6.o: In function `main':
scrivener.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/cc0GsqHL.o:grader.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status