Submission #1010730

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010730		ASGA_RedSea	Stove (JOI18_stove)	C++17	100 / 100	40 ms	6496 KiB

stove

/**

                                    * بسم الله الرحمن الرحيم *

                ﴾ رَبِّ اشْرَحْ لِي صَدْرِي * وَيَسِّرْ لِي أَمْرِي * وَاحْلُلْ عُقْدَةً مِّن لِّسَانِي * يَفْقَهُوا قَوْلِي ﴿

*/

/// author : "ASGA"

#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

#define ONLINE 0
#ifdef ONLINE_JUDGE
    #undef ONLINE;
    #define ONLINE 1
#endif

#define dbg(a) if(!ONLINE)cout << a << ' ';

const ll inf = 1e18;

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

    int n,k;cin >> n >> k;
    vector <int> a(n);
    for(int& i : a)cin >> i;
    ll ans = a.back() + 1 - a[0];
    multiset <int> s;
    for(int i = 0;i + 1 < n;i++)s.insert(a[i + 1] - a[i]);

    auto i = s.rbegin();
    while(--k){ans -= (*i++);ans++;}

    cout << ans << '\n';

    return 0;
}

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