Submission #1258612

#	Time	Username	Problem	Language	Result	Execution time	Memory
1258612		motion	Global Warming (CEOI18_glo)	C++20	100 / 100	39 ms	3268 KiB

glo

#include<bits/stdc++.h>
using namespace std;
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n,x;
    cin>>n>>x;
    vector<int> v(n);
    for(int i=0;i<n;i++)
    {
        cin>>v[i];
    }
    vector<int> dp,val(n);
    for(int i=0;i<n;i++)
    {
        int pos=lower_bound(dp.begin(),dp.end(),v[i])-dp.begin();
        int pos_2=lower_bound(dp.begin(),dp.end(),v[i]+x)-dp.begin();
        val[i]=pos_2;
        if(pos==dp.size())
        {
            dp.push_back(v[i]);
        }
        else
        {
            dp[pos]=v[i];
        }
    }
    vector<int> dp2(n,0);
    for(int i=n-1;i>=0;i--)
    {
        int pos=upper_bound(dp2.begin(),dp2.end(),v[i])-dp2.begin();
        pos--;
        dp2[pos]=v[i];
        val[i]+=n-pos;
    }
    int ans=0;
    for(int i=0;i<n;i++)
    {
        ans=max(ans,val[i]);
    }
    cout<<ans;

}

• 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