Submission #929091

#	Time	Username	Problem	Language	Result	Execution time	Memory
929091		Karoot	Rabbit Carrot (LMIO19_triusis)	C++17	100 / 100	94 ms	16864 KiB

triusis

#include <iostream>
#include <cmath>
#include <unordered_map>
#include <map>
#include <set>
#include <queue>
#include <vector>
#include <string>
#include <iomanip>
#include <algorithm>

#define all(x)  (x).begin(), (x).end()
#define rall(x)  (x).rbegin(), (x).rend()

using namespace std;

typedef long long ll;

ll linf = 1e15+1;

inline void scoobydoobydoo(){
    ios::sync_with_stdio(false);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
}

int main(){
    scoobydoobydoo();
    ll n, M; cin >> n >> M;
    vector<ll> v(n);
    vector<ll> filtered;
    for (int i = 0; i < n; i++){
        cin >> v[i];
        if (v[i] <= M*(i+1))filtered.push_back(-v[i]+M*(i+1));
    }

    set<pair<ll, ll> > s; //value, dp

    ll dp[200001];

    if (filtered.size() == 0){
        cout << n << endl;
        return 0;
    }

    dp[0] = 1;
    s.insert({0, 0});
    s.insert({filtered[0], 1});
    for (int i = 1; i < filtered.size(); i++){
        auto it = s.upper_bound({filtered[i], 10000000});
        it--;
        dp[i] = (*it).second + 1;
        if ((*it).first == filtered[i])s.erase(it);
        s.insert({filtered[i], dp[i]});

        while (true){
            auto itr = s.find({filtered[i], dp[i]});
            itr++;
            if (itr == s.end())break;
            if ((*itr).second > dp[i])break;
            s.erase(itr);
        }
    
    }


    cout << n - (*s.rbegin()).second << endl;






    return 0;
}

Compilation message (stderr)

triusis.cpp: In function 'int main()':
triusis.cpp:49:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int i = 1; i < filtered.size(); i++){
      |                     ~~^~~~~~~~~~~~~~~~~

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