Submission #972308

#	Time	Username	Problem	Language	Result	Execution time	Memory
972308		sofija6	Global Warming (CEOI18_glo)	C++14	100 / 100	47 ms	6592 KiB

glo

#include <bits/stdc++.h>
#define ll long long
#define MAXN 200010
using namespace std;
ll t[MAXN],lis[MAXN];
int main()
{
    ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n,x,ans=0;
    cin >> n >> x;
    for (ll i=1;i<=n;i++)
        cin >> t[i];
    vector<ll> v;
    for (ll i=1;i<=n;i++)
    {
        auto it=lower_bound(v.begin(),v.end(),t[i]);
        if (it==v.end())
        {
            v.push_back(t[i]);
            lis[i]=v.size();
        }
        else
        {
            lis[i]=it-v.begin()+1;
            v[it-v.begin()]=t[i];
        }
    }
    v.clear();
    for (ll i=n;i>0;i--)
    {
        auto it=lower_bound(v.begin(),v.end(),-t[i]);
        ans=max(ans,lis[i]+(it-v.begin()));
        t[i]+=x;
        it=lower_bound(v.begin(),v.end(),-t[i]);
        if (it==v.end())
            v.push_back(-t[i]);
        else
            v[it-v.begin()]=-t[i];
    }
    cout << ans;
    return 0;
}

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