Submission #1233761

#	Time	Username	Problem	Language	Result	Execution time	Memory
1233761		Zbyszek99	Crayfish scrivener (IOI12_scrivener)	C++20	34 / 100	460 ms	327680 KiB

scrivener

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define ll long long
#define ld long double
#define ull unsigned long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace __gnu_pbds;
using namespace std;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
//mt19937 mt;void random_start(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll los(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;

int l = 0;
int r = (1 << 20)-1;

struct node
{
    node* left;
    node* right;
    bool is_son = 0;
    char val = 'a';
    void get_son()
    {
        if(!is_son)
        {
            left = new node;
            right = new node;
        }
        is_son = 1;
    }
    char get_val(int poz)
    {
        if(l == r) return val;
        if((l+r)/2 >= poz) 
        {
            r = (l+r)/2;
            return left -> get_val(poz);
        }
        l = (l+r)/2+1;
        return right -> get_val(poz);
    }
    void add(int poz, node* prev, int x)
    {
        if(l == r)
        {
            val = x;
            return;
        }
        prev -> get_son();
        is_son = 1;
        if(poz <= (l+r)/2)
        {
            right = prev -> right;
            left = new node;
            r = (l+r)/2;
            left -> add(poz,prev->left,x);
        }
        else
        {
            left = prev -> left;
            right = new node;
            l = (l+r)/2+1;
            right -> add(poz,prev->right,x);
        }
    }
};

vector<node*> nodes;
vi sizes;

void Init() 
{
    node* xd = new node;
    nodes.pb(xd);
    sizes.pb(0);
}

void TypeLetter(char L) 
{
    node* xd2 = new node;
    l = 0;
    r = (1 << 20)-1;
    xd2->add(sizes.back(),nodes[siz(nodes)-1],L);
    sizes.pb(sizes.back()+1);
    nodes.emplace_back(xd2);
}

void UndoCommands(int U) 
{
    nodes.pb(nodes[siz(nodes)-1-U]);
    sizes.pb(sizes[siz(sizes)-1-U]);
}

char GetLetter(int P) 
{
    l = 0;
    r = (1 << 20)-1;
    return nodes.back() -> get_val(P);
}

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