Submission #1218268

#	Time	Username	Problem	Language	Result	Execution time	Memory
1218268		benr	Rabbit Carrot (LMIO19_triusis)	C++20	100 / 100	55 ms	6584 KiB

triusis

#include <bits/stdc++.h>
using namespace std;

int n, m;

int lds (vector<long long> &a) {
    for (int i = 0; i < a.size(); i++) a[i] *= -1;
    // now we can do lis
    vector<long long> dp; // smallest last number for each increasing subsequence length
    for (int i = 0; i < a.size(); i++) {
        int position = upper_bound(dp.begin(), dp.end(), a[i]) - dp.begin();
        if (position == dp.size()) {
            dp.push_back(a[i]);
        } else {
            dp[position] = a[i];
        }
    }
    return dp.size();
}

int main() {
    cin >> n >> m;
    vector<long long> bridge (n);
    vector<long long> nochange;
    for (int i = 0; i < n; i++) {
        cin >> bridge[i];
        bridge[i] -= m * (i + 1); // makes it so bunnies jump is 0
        if (bridge[i] <= 0) nochange.push_back(bridge[i]);
    }
    cout << n - lds(nochange);
}

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