Submission #1085643

#	Time	Username	Problem	Language	Result	Execution time	Memory
1085643		vjudge1	Global Warming (CEOI18_glo)	C++17	100 / 100	78 ms	5416 KiB

glo

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n,x,a;
    cin>>n>>x;
    vector<int>v,dp(n,INT_MAX),pref;
    for(int i=0;i<n;i++)
    {
        cin>>a;
        v.push_back(a);
    }
    int res=0;
    for(int i=0;i<n;i++)
    {
        int temp=lower_bound(dp.begin(),dp.end(),v[i])-dp.begin();
        pref.push_back(temp+1);
        dp[temp]=v[i];
        res=max(res,temp+1);
    }
    for(int i=0;i<n;i++)
    {
        dp[i]=INT_MAX;
    }
    for(int i=n-1;i>=0;i--)
    {
        int temp=lower_bound(dp.begin(),dp.end(),-v[i]+x)-dp.begin();
        res=max(res,pref[i]+temp);
        temp=lower_bound(dp.begin(),dp.end(),-v[i])-dp.begin();
        dp[temp]=-v[i];
    }
    cout<<res;
    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