| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 379276 | MilosMilutinovic | 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.
#include "scrivener.h"
#include <bits/stdc++.h>
using namespace std;
const int N=1000050,M=N*16;
int root[M],ls[M],rs[M],tsz,cnt,sz[N];
char ch[M];
void Set(int p,int&c,int ss,int se,int qi,char L){
c=++tsz;ls[c]=ls[p];rs[c]=rs[p];ch[c]=L;
if(ss==se)return;
int mid=ss+se>>1;
if(qi<=mid)Set(ls[p],ls[c],ss,mid,qi,L);
else Set(rs[p],rs[c],mid+1,se,qi,L);
}
char Get(int c,int ss,int se,int qi){
if(ss==se)return ch[c];
int mid=ss+se>>1;
if(qi<=mid)return Get(ls[c],ss,mid,qi);
else return Get(rs[c],mid+1,se,qi);
}
void Init(){}
void TypeLetter(char L){
cnt++;sz[cnt]=sz[cnt-1];root[cnt]=root[cnt-1];
Set(root[cnt],root[cnt],1,N,sz[cnt],L);
}
void UndoCommands(int x){
cnt++;root[cnt]=root[cnt-x-1];
sz[cnt]=sz[cnt-x-1];
}
char GetLettter(int x){
return Get(root[cnt],1,N,x+1);
}