Submission #709489

#	Time	Username	Problem	Language	Result	Execution time	Memory
709489		thanhnhanqn77	Rabbit Carrot (LMIO19_triusis)	C++14	63 / 100	2 ms	728 KiB

triusis

#include <bits/stdc++.h>
#define fu(i, a, b) for(int i = (a); i <= (b); i++)
#define fd(i, a, b) for(int i = (a); i >= (b); i--)
#define ll long long
using namespace std;
const int N = 5e3 + 5;
const int MAXA = 5005;
const int INF = 1e9 + 5;

int n;
int lim;
int a[N];


struct Segment
{
    vector<int> nodes;
    void init(int n)
    {
        nodes.resize(4 * n + 5, INF);
    }
    void update(int id, int l, int r, int u, int v, int val)
    {
        if(v < l || u > r) return;
        if(l == r) {
            nodes[id] = val;
            return;
        }
        int mid = (l + r) / 2;
        update(id * 2, l, mid, u, v, val);
        update(id * 2 + 1, mid + 1, r, u, v, val);
        nodes[id] = min(nodes[id * 2], nodes[id * 2 + 1]);
    }
    int get(int id, int l, int r, int u, int v)
    {
        if(v < l || u > r) return INF;
        if(u <= l && r <= v) return nodes[id];
        int mid = (l + r) / 2;
        return min(get(id * 2, l, mid, u, v), get(id * 2 + 1, mid + 1, r, u, v));
    }
};
Segment f;

int dp[N];
vector<int> lis;


int LIS()
{
    int maxlen = 0;
    int sz = (int)lis.size();
    fu(i, 0, sz - 1)
    {
       int x = upper_bound(dp, dp + maxlen, lis[i]) - dp;
       if(x == maxlen) {
            dp[maxlen] = lis[i];
            maxlen++;
       }
       else {
            dp[x] = lis[i];
       }
    }
    return maxlen;

}

void solve()
{
    fu(i, 1, n)
    {
        if(i * lim >= a[i]) {
            lis.push_back(i * lim - a[i]);
        }
    }
    cout << n - LIS();
}

void read()
{
    cin >> n >> lim;
    fu(i, 1, n) cin >> a[i];
    solve();

}

int main()
{
//    freopen("tester.inp","r",stdin);
//    freopen("tester.out","w",stdout);
    ios_base::sync_with_stdio(false);cin.tie(0);
    read();
}

• Subtask 1: 14 / 14
• Subtask 2: 21 / 21
• Subtask 3: 28 / 28
• Subtask 4: 0 / 37