Submission #926580

#	Time	Username	Problem	Language	Result	Execution time	Memory
926580		Aiperiii	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	78 ms	5524 KiB

triusis

#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define pb push_back
using namespace std;
signed main(){
    ios_base::sync_with_stdio();
    cin.tie(0);cout.tie(0);
    int n,m;
    cin>>n>>m;
    vector <int> a(n);
    for(int i=0;i<n;i++)cin>>a[i];
    for(int i=0;i<n;i++){
        a[i]-=(i+1)*m;
    }
    reverse(all(a));
    vector <int> v(n+1,1e18);
    v[0]=-1e18;
    for(int i=0;i<n;i++){
        auto pos=upper_bound(all(v),a[i])-v.begin();
        v[pos]=a[i];
    }
    auto pos=upper_bound(all(v),0ll)-v.begin();
    cout<<n+1-pos<<"\n";
}
/*
 
5 400
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700
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3 300
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1300
 */

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 37 / 37