Submission #384830

#	Time	Username	Problem	Language	Result	Execution time	Memory
384830		ngpin04	Rabbit Carrot (LMIO19_triusis)	C++14	100 / 100	36 ms	5356 KiB

triusis

#include <bits/stdc++.h>
#define int long long 
using namespace std;
const int N = 2e5 + 5;
 
int a[N];
int n,m;
 
signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    //freopen("file.inp","r",stdin);
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        a[i] -= i * m;
        a[i] = -a[i];
    }
    vector <int> lis(n + 1, 1e18 + 1);
    lis[0] = -1e18;
    int res = 0;
    for (int i = 1; i <= n; i++) {
        if (a[i] < 0)
        	continue;
        int len = upper_bound(lis.begin(), lis.end(), a[i]) - lis.begin();
        lis[len] = a[i];
        res = max(res, len);
        //cout << a[i] << "\n";
    }
    cout << n - res;
    return 0;
}

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