Submission #1241751

#	Time	Username	Problem	Language	Result	Execution time	Memory
1241751		datluong_04	Rabbit Carrot (LMIO19_triusis)	C++20	100 / 100	20 ms	4168 KiB

triusis

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define maxn 200005
#define FOR(i , a , b) for(int i = a ; i <= b; i++)
#define FAST ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int a[maxn];
ll b[maxn] ,c[maxn];

int main(){
    FAST;
    int n;
    ll M;
    cin >> n >> M;
    FOR(i , 1 , n) cin >> a[i];
    int c_pos = 0;
    FOR(i , 1 , n){
        if(M * i >= a[i]){
            c[++c_pos] = M * i - 1ll*a[i];
        }
    }

    FOR(i , 1 , c_pos) b[i] = 2e9;
    int ans = 0;

    FOR(i , 1 , c_pos){
        int k = upper_bound(b + 1, b + c_pos + 1, c[i]) - b;
        b[k] = c[i];
        ans = max(ans , k);
    }

    cout << n - ans;
}

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