Submission #1115397

#	Time	Username	Problem	Language	Result	Execution time	Memory
1115397		staszic_ojuz	Stove (JOI18_stove)	C++17	100 / 100	848 ms	128364 KiB

stove

#include <iostream>
#include <algorithm>
#include <cmath>
#include <queue>
#include <vector>
#include <stack>
#include <unordered_map>

using namespace std;

typedef long long ll;

struct triple {
    ll a;
    ll b;
    ll c;
};

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    ll n, k; cin >> n >> k;
    vector<bool> os(1e9, false);
    ll pren = n;
    ll last = 0;
    for(int i = 0; i < n; i++) {
        ll t; cin >> t;
        os[t-1] = true;
        last = max(last, t);
    }

    vector<pair<ll,ll>> prze;
    if(os[0]) {
        prze.push_back({0, 1});
    }
    for(int i = 1; i < last + 1; i++) {
        if(os[i]) {
            if(os[i - 1]) {
                prze[prze.size() - 1].second+=1;
            } else {
                prze.push_back({i, 1});
            }
        }
    }
    n = prze.size();
    // ll st = n/k;
    // ll nad = n%k;
    
    vector<pair<ll, pair<ll,ll>>> diff(n - 1);
    for(int i = 0; i < n - 1; i++) {
        diff[i].first = prze[i + 1].first - prze[i].first - prze[i].second;
        diff[i].second = {i, i + 1};
        //cout << diff[i].first << " ";
    }

    sort(diff.begin(), diff.end(), [](pair<ll, pair<ll,ll>> a, pair<ll, pair<ll,ll>> b) {return a.first > b.first;});

    ll dod = prze.size() - k;
    ll wyn = pren;
    for(int i = 0; i < dod; i++) {
        wyn += diff[diff.size() - 1].first;
        diff.pop_back();
    }
    cout << wyn;


    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50