Submission #348642

#	Time	Username	Problem	Language	Result	Execution time	Memory
348642		talant117408	Dancing Elephants (IOI11_elephants)	C++17	26 / 100	9073 ms	3948 KiB

elephants

#include "elephants.h"
#ifndef EVAL
#include "grader.cpp"
#endif


#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>

//using namespace __gnu_pbds;
using namespace std;

//typedef tree <int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;

int n;
int len, pos[50003];
vector <int> ls;
set <int> st;

void init(int N, int L, int X[]){
    n = N;
    if(n > 70000) exit(0);
    len = L;
    for(int i = 0; i < n; i++) pos[i] = X[i];
    for(int i = 0; i < n; i++) st.insert(pos[i]);
    for(auto to : st){
        if(sz(ls) == 0 || ls.back()+len < to) ls.pb(to);
    }
}

int update(int i, int y){
    int prev = pos[i];
    st.erase(st.find(pos[i]));
    pos[i] = y;
    st.insert(pos[i]);
    
    auto it = st.lb(min(y, prev));
    while(sz(ls) && ls.back() >= min(y, prev)) ls.pop_back();
    for(auto itt = it; itt != st.end(); itt++){
        if(sz(ls) == 0 || ls.back()+len < *itt) ls.pb(*itt);
    }
    
    return sz(ls);
}

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3