Submission #550412

#	Time	Username	Problem	Language	Result	Execution time	Memory
550412		Jomnoi	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	35 ms	5320 KiB

triusis

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

const int MAX_N = 2e5 + 10;

int a[MAX_N];

int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int N, M;
    cin >> N >> M;
    for(int i = 1; i <= N; i++) {
        cin >> a[i];
    }

    vector <int> vec;
    for(int i = 1; i <= N; i++) {
        if(i * M >= a[i]) {
            vec.push_back(i * M - a[i]);
        }
    }

    vector <int> lnds;
    for(auto v : vec) {
        auto it = upper_bound(lnds.begin(), lnds.end(), v);
        if(it == lnds.end()) {
            lnds.push_back(v);
        }
        else {
            *it = v;
        }
    }

    cout << N - lnds.size();
    return 0;
}

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