Submission #1127796

#	Time	Username	Problem	Language	Result	Execution time	Memory
1127796		byhtlm	Global Warming (CEOI18_glo)	C++20	52 / 100	142 ms	9812 KiB

glo

  /***********************************
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██║░░██║░░░██║░░░███████╗██║░╚═╝░██║
╚═╝░░╚═╝░░░╚═╝░░░╚══════╝╚═╝░░░░░╚═╝
***********************************/

//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <unistd.h>

//#include "functions.h"

#define int l
#define f first
#define s second
#define endl '\n'
#define l long long
#define ara <<" "<<
#define pb push_back
#define pairs pair<l,l>
#define NO cout<<"NO"<<endl
#define stop system("pause")
#define YES cout<<"YES"<<endl
#define all(v) v.begin(),v.end()
#define yesno(v) ((v) ? "YES" : "NO")
#define dbg(x) cout<<#x<<" = "<<x<<endl;
#define filereader() ifstream cin(input);
#define fileprinter() ofstream cout(output);
#define fast ios_base::sync_with_stdio(NULL);cin.tie(NULL);cout.tie(NULL);


using namespace std;
using namespace __gnu_pbds;

typedef tree<int, null_type, less_equal<int> , rb_tree_tag, tree_order_statistics_node_update> indexed_set;

const l N = 2e5 + 5;
const l INF = 1e18;
const l mod = 1e9 + 7;

const string  input =  "input.txt";
const string output = "output.txt";

l gcd(l a, l b){
    if(b == 0){
        return a;
    }
    return gcd(b,a%b);
}

l binpow(l a, l b) {
    if (b == 0)
        return 1;

    l res = binpow(a, b / 2);

    if (b % 2)
        return ((res * res) % mod * a) % mod;
    else
        return (res * res) % mod;
}



void solve(){
    l n,x;
    cin>>n>>x;


    vector<l>v(n);

    vector<l>used(n);
    vector<l>par(n);
    set<l>s;

    for(int &i : v){
        cin>>i;
    }
    used[n-1] = 1;
    s.insert(v[n - 1]);


    for(int i = n - 2 ; i >= 0 ; i--){
        l bg = *s.begin();

        if(v[i] < bg){
            used[i] = 1;
        }
        else{
            auto t = s.upper_bound(v[i]);t--;
            par[i] = *t;
            s.erase(t);
        }
        s.insert(v[i]);
    }

    l maks = s.size();


    set<l>st;

    for(int i = 0 ; i < n ; i++){
        s.erase(v[i]);

        if(used[i] == 0){
            s.insert(par[i]);
        }

        l lst = -INF;

        if(i != 0 and st.size() > 0){
            lst = *st.rbegin();
        }

        v[i] -= x;

        if(v[i] <= lst and st.size() > 0){
            st.erase(st.lower_bound(v[i]));
        }
        st.insert(v[i]);

        l f = -INF;

        if(st.size() != 0){
            f = *st.rbegin();
        }
    /*
        cout<<i<<" "<<st.size()<<" "<<s.size()<<endl;

        for(int e : st){
            cout<<e<<" ";
        }
        cout<<endl;
        for(int e : s){
            cout<<e<<" ";
        }
        cout<<endl;
        cout<<endl;
*/
        while(s.size() > 0){
            auto p = s.begin();

            if(*p <= f){
                s.erase(p);
            }
            else{
                break;
            }
        }


        l sz = st.size() + s.size();
        maks = max(maks , sz);

    }

    cout<<maks<<endl;




    /*
    x = 1

    0 0 0 0 0
    1 2 3 4 5

    s  : 5

    st : 1 2 3 4

    */
}

signed main(){
    //fast;

    l n = 1;
    //cin>>n;

    while(n--){
        solve();
    }

}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 17 / 17
• Subtask 7: 0 / 25