# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
62565 | zetapi | Crayfish scrivener (IOI12_scrivener) | C++14 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
const int MAX=1e6+99;
char X[MAX];
int ind,tot,arr[MAX],height[MAX],Parent[MAX][22];
void TypeLetter(char L)
{
X[++ind]=L;
Parent[ind][0]=arr[tot++];
height[ind]=height[Parent[ind][0]]+1;
for(int A=1;A<21;A++)
Parent[ind][A]=Parent[Parent[ind][A-1]][A-1];
arr[tot]=ind;
return ;
}
void UndoCommands(int U)
{
++tot;
arr[tot]=arr[tot-U-1];
return ;
}
char GetLetter(int P)
{
int res=arr[tot];
for(int A=20;A>=0;A--)
{
if(height[Parent[res][A]]>P)
res=Parent[res][A];
}
return X[res];
}