Submission #1319323

#	Time	Username	Problem	Language	Result	Execution time	Memory
1319323		khanhphucscratch	Rabbit Carrot (LMIO19_triusis)	C++20	100 / 100	26 ms	5104 KiB

triusis

#include<bits/stdc++.h>
#define int long long
using namespace std;
int a[200005], dp[200005], startOf[200005];
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int n, m; cin>>n>>m;
    for(int i = 1; i <= n; i++){
        cin>>a[i]; a[i] -= i*m;
    }
    reverse(a+0, a+n+1);
    memset(startOf, 0x3f, sizeof(startOf)); startOf[0] = -1e18;
    for(int i = 0; i <= n; i++){
        dp[i] = upper_bound(startOf + 0, startOf + n + 2, a[i]) - startOf;
        startOf[dp[i]] = min(startOf[dp[i]], a[i]);
    }
    cout<<n+1-dp[n];
}

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