제출 #528894

#제출 시각아이디문제언어결과실행 시간메모리
528894DragosC1Rabbit Carrot (LMIO19_triusis)C++17
100 / 100
27 ms3700 KiB
#include <iostream>
using namespace std;

#define fast ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);

int a[200001], lung;
int b[200001], l;

int main() {
    fast
    int i, n, m, x, st, dr, mij;
    cin >> n >> m;
    for (i = 1; i <= n; i++) {
        cin >> x;
        if (x <= i * m)
            a[++lung] = i * m - x;
    }
    for (i = 1; i <= lung; i++)
        if (l == 0 || a[i] >= b[l])
            b[++l] = a[i];
        else {
            st = 1, dr = l;
            while (st <= dr) {
                mij = (st + dr) / 2;
                if (b[mij] > a[i])
                    dr = mij - 1;
                else st = mij + 1;
            }
            b[st] = a[i];
        }
    cout << n - l;
    return 0;
}
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