Submission #999620

#	Time	Username	Problem	Language	Result	Execution time	Memory
999620		vjudge1	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	62 ms	7364 KiB

triusis

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

#define int long long
#define inf (int)1e15

int binsearch(int val, vector<int>& vec){
    int l = 0, r = (int)vec.size()-1, mid;
    while(l < r){
        mid = (l + r + 1)/2;
        if(vec[mid] <= val){
            l = mid;
        }else{
            r = mid-1;
        }
    }
    if(l != (int)vec.size() - 1 && vec[l] <= val){
        l++;
    }
    return l;
}

void solve(){
    int n, m; cin >> n >> m;
    vector<int> vals;
    for(int i = 0; i < n; i++){
        int in;
        cin >> in;
        in -= (m * i);
        if(in <= m){
            vals.push_back(in);
        }
    }
    if((int)vals.size() != 0LL) reverse(vals.begin(), vals.end());
    vector<int> v;
    //v sorted in increasing size
    for(int i = 0; i < (int)vals.size(); i++){
        if((int)v.size() == 0){
            v.push_back(vals[i]);
            continue;
        }
        int ind = binsearch(vals[i], v);
        //strictly < in case 
        if(v[ind] <= vals[i]){
            v.push_back(vals[i]);
        }else{
            v[ind] = vals[i];
        }
        /*cout << ind << "\n";
        for(int j : v) cout << j << " ";
        cout << "\n";*/
    }
    cout << n - (int)v.size() << "\n";
    /*for(int i : v) cout << i << " ";
    cout << "\n";
    for(int i : vals) cout << i << " ";
    cout << "\n";*/
}

signed main(){
    //ios::sync_with_stdio(false), cin.tie(0);
    //freopen("txt.in", "r", stdin); freopen("txt.out", "w", stdout);
    //int t; cin >> t; while(t--)
    solve();
}

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