Submission #1315178

#	Time	Username	Problem	Language	Result	Execution time	Memory
1315178		thanhbinh13	Rabbit Carrot (LMIO19_triusis)	C++20	100 / 100	28 ms	3552 KiB

triusis

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

long long n,m,h[200002],f[200002];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        cin >> h[i];
        h[i] -= i*m;
    }
    for (int i = 1; i <= n; i++) {
        f[i] = 1e18;
    }
    long long ans = 0;
    for (int i = n; i >= 0; i--) {
        ans = 1;
        long long l = 1,r = n;
        while(l <= r) {
            long long mid = (l+r)/2;
            if (f[mid] > h[i]) r = mid-1;
            else {
                l = mid+1;
                ans = mid+1;
            }
        }
        f[ans] = min(f[ans],h[i]);
    }
    cout  << n-ans+1;
}

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