Submission #239435

#	Time	Username	Problem	Language	Result	Execution time	Memory
239435		aggu_01000101	Crayfish scrivener (IOI12_scrivener)	C++14	34 / 100	582 ms	262148 KiB

scrivener

#include <bits/stdc++.h>
//#define int long long
#define INF 1000000000000000
#define lchild(i) (i*2 + 1)
#define rchild(i) (i*2 + 2)
#define mid(l, u) ((l+u)/2)
#define x(p) p.first
#define y(p) p.second
#define MOD 998244353
using namespace std;
struct node{
    int l;
    int r;
    char val;
};
node* buffer[100*(1000000)];
int cnode = 0;
int initnode(int left = -1, int right = -1, char v = 'A'){
    buffer[cnode] = new node;
    buffer[cnode]->l = left;
    buffer[cnode]->r = right;
    buffer[cnode]->val = v;
    return cnode++;
}
signed version[(int)1e6 + 5];
signed ptr[(int)1e6 + 5];
signed ind = 1;
char query(int l, int u, int ll, int i){
    if(l>=ll && u<=ll) return buffer[i]->val;
    if(ll<=mid(l, u)){
        return query(l, mid(l, u), ll, buffer[i]->l);
    }
    return query(mid(l, u)+1, u, ll, buffer[i]->r);
}
int update(int l, int u, int i, int ll, char v){
    //cout<<"update "<<l<<" "<<u<<" "<<ll<<" "<<v<<"\n";
    if(l>=ll && u<=ll) return initnode(-1, -1, v);
    int tr = initnode();
    if(i!=-1) buffer[tr]->l = buffer[i]->l;
    if(i!=-1) buffer[tr]->r = buffer[i]->r;
    if(ll<=mid(l, u)){
        buffer[tr]->l = update(l, mid(l, u), buffer[tr]->l, ll, v);
    }
    else buffer[tr]->r = update(mid(l, u)+1, u, buffer[tr]->r, ll, v);
    return tr;
}
void Init(){
    version[0] = initnode();
    ptr[0] = 0;
}
void TypeLetter(char l){
    version[ind] = update(0, 1000000, version[ind - 1], ptr[ind-1], l);
    ptr[ind] = ptr[ind-1] + 1;
    ind++;
}
void UndoCommands(signed u){
    version[ind] = version[ind-1-u];
    ptr[ind] = ptr[ind - 1 - u];
    ind++;
}
char GetLetter(signed p){
    return query(0, 1000000, p, version[ind - 1]);
}
/*signed main(){
    Init();
    int q;
    cin>>q;
    while(q--){
        int type;
        cin>>type;
        if(type==1){
            char l;
            cin>>l;
            TypeLetter(l);
        }
        else if(type==2){
            int u;
            cin>>u;
            UndoCommands(u);
        }
        else{
            int pos;
            cin>>pos;
            cout<<GetLetter(pos)<<endl;
        }
    }
}*/
/*
 1 a
 1 b
 3 1
 1 d
 2 2
 2 1
 3 2
 1 e
 2 1
 2 5
 1 c
 3 2
 2 2
 3 2
 */

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 22 / 22
• Subtask 4: 0 / 26
• Subtask 5: 0 / 40