Submission #62921

#	Time	Username	Problem	Language	Result	Execution time	Memory
62921		theknife2001	Crayfish scrivener (IOI12_scrivener)	C++17	Compilation error	0 ms	0 KiB

scrivener

#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=0;

void Init()
{
    node=cnt++;
    memset(trie,-1,sizeof trie);
}

int c,temp,nd;
void TypeLetter(char L)
{
    c=L-'a';
    temp=node;
    if(trie[node][c]==-1)
        trie[node][c]=cnt++;
    node=trie[node][c];
    letter[node]=L;
    a[k]=node;
    if(k!=0)
        l[k]=l[k-1]+1;
    else
        l[k]=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;
  	while(P--)
      nd=p[nd][0]
    //for(int i=20;i>=0;i--)
    //{
        //if((P&(1<<i)))
      //      nd=p[nd][i];
    //}
    return letter[nd];
}

Compilation message (stderr)

scrivener.cpp: In function 'char GetLetter(int)':
scrivener.cpp:67:5: error: expected ';' before 'return'
     return letter[nd];
     ^~~~~~
scrivener.cpp:68:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^