Submission #1134073

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134073		alexdd	Rabbit Carrot (LMIO19_triusis)	C++20	100 / 100	613 ms	90412 KiB

triusis

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 1e10;
int n,m;
int a[200005],dp[200005];

unordered_map<int,int> aib;
int maxval=3*INF;
int qry(int poz)
{
    poz+=INF;
    int aux=INF;
    for(int i=poz;i<=maxval;i+=(i&(-i)))
        aux=min(aux,aib[i]);
    return aux+INF;
}
void upd(int poz, int newv)
{
    poz+=INF;
    newv-=INF;
    for(int i=poz;i>0;i-=(i&(-i)))
        aib[i]=min(aib[i],newv);
}

signed main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);
    cin>>n>>m;
    for(int i=1;i<=n;i++)
        cin>>a[i];
    n++;
    a[n]=0;
    upd(0,0);
    for(int i=1;i<=n;i++)
    {
        dp[i]=INF;
        if(a[i]-i*m > 0)
            continue;
        dp[i] = qry(a[i]-i*m);
        dp[i]+=i-1;
        upd(a[i]-i*m, dp[i]-i);
    }
    cout<<dp[n];
    return 0;
}

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