oj.uz

Submission #916250

# Submission time Handle Problem Language Result Execution time Memory
916250 2024-01-25T14:36:08 Z JakobZorz Dancing Elephants (IOI11_elephants) C++17
26 / 100
 509 ms 20244 KB 
#include"elephants.h"
#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
typedef long long ll;

const int BUCKET_SIZE=256;
ll n,l;
ll pos[150000];

struct Bucket{
    vector<ll>arr;
    vector<ll>num;
    vector<ll>pos;
    
    void regen(){
        num.resize(arr.size());
        pos.resize(arr.size());
        for(int i=(int)arr.size()-1;i>=0;i--){
            num[i]=1;
            ll p=arr[i]+l;
            if(p>=arr.back()){
                pos[i]=p;
                continue;
            }
            
            int l=i-1,r=(int)arr.size()-1;
            while(l<r-1){
                int m=(l+r)/2;
                if(arr[m]<=p)
                    l=m;
                else
                    r=m;
            }
            num[i]=num[r]+1;
            pos[i]=pos[r];
        }
    }
    
    void erase(int el){
        auto it=lower_bound(arr.begin(),arr.end(),el);
        arr.erase(it);
        
        regen();
    }
    
    void add(int el){
        auto it=upper_bound(arr.begin(),arr.end(),el);
        arr.insert(it,el);
        
        regen();
    }
    
    pair<ll,ll>get(ll p){
        if(arr.empty()||p>=arr.back())
            return{0,p};
        
        int l=-1,r=(int)arr.size()-1;
        while(l<r-1){
            int m=(l+r)/2;
            if(arr[m]<=p)
                l=m;
            else
                r=m;
        }
        
        return{num[r],pos[r]};
    }
};

vector<Bucket*>buckets;

void init(int N,int L,int X[]){
    n=N;
    l=L;
    vector<int>vec;
    for(int i=0;i<n;i++){
        pos[i]=X[i];
        vec.push_back(X[i]);
    }
    sort(vec.begin(),vec.end());
    buckets.push_back(new Bucket);
    for(int i:vec){
        buckets.back()->arr.push_back(i);
        if((int)buckets.back()->arr.size()>=BUCKET_SIZE){
            buckets.push_back(new Bucket);
        }
    }
    
    for(auto i:buckets)
        i->regen();
}

int update(int i,int y){
    // balance buckets
    for(int i=0;i<(int)buckets.size();i++){
        if(buckets[i]->arr.size()>=2*BUCKET_SIZE){
            buckets.insert(buckets.begin()+i+1,new Bucket);
            buckets[i+1]->arr={buckets[i]->arr.begin()+buckets[i]->arr.size()/2,buckets[i]->arr.end()};
            buckets[i]->arr.erase(buckets[i]->arr.begin()+buckets[i]->arr.size()/2,buckets[i]->arr.end());
            buckets[i]->regen();
            buckets[i+1]->regen();
        }
    }
    
    for(auto b:buckets){
        if(b->arr[0]<=pos[i]&&pos[i]<=b->arr.back()){
            b->erase(pos[i]);
            break;
        }
    }
    pos[i]=y;
    
    int cb=0;
    while(cb<(int)buckets.size()){
        if(!buckets[cb]->arr.empty()&&buckets[cb]->arr[0]>=y)
            break;
        cb++;
    }
    if(cb)
        cb--;
    
    buckets[cb]->add(y);
    
    ll pos=-1,res=0;
    
    for(auto b:buckets){
        auto r=b->get(pos);
        res+=r.first;
        pos=r.second;
    }
    
    return res;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8536 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8536 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8536 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct

Subtask #3
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8536 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8536 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 430 ms 9300 KB Output is correct
8 Correct 469 ms 9724 KB Output is correct
9 Correct 509 ms 10496 KB Output is correct
10 Correct 506 ms 12348 KB Output is correct
11 Runtime error 28 ms 20244 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8536 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8536 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 430 ms 9300 KB Output is correct
8 Correct 469 ms 9724 KB Output is correct
9 Correct 509 ms 10496 KB Output is correct
10 Correct 506 ms 12348 KB Output is correct
11 Runtime error 28 ms 20244 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -

Subtask #5
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8540 KB Output is correct
2 Correct 2 ms 8536 KB Output is correct
3 Correct 2 ms 8540 KB Output is correct
4 Correct 2 ms 8536 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 2 ms 8540 KB Output is correct
7 Correct 430 ms 9300 KB Output is correct
8 Correct 469 ms 9724 KB Output is correct
9 Correct 509 ms 10496 KB Output is correct
10 Correct 506 ms 12348 KB Output is correct
11 Runtime error 28 ms 20244 KB Execution killed with signal 11
12 Halted 0 ms 0 KB -