Submission #369086

#	Time	Username	Problem	Language	Result	Execution time	Memory
369086		Lam_lai_cuoc_doi	Stove (JOI18_stove)	C++17	0 / 100	1 ms	364 KiB

stove

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;

const bool typetest = 0;
const int N = 1e5 + 5;
int n, k;
ll a[N], b[N];

void Read()
{
    cin >> n >> k;
    for (int i = 1; i <= n; ++i)
        cin >> a[i];
    for (int i = 1; i < n; ++i)
        b[i] = a[i + 1] - a[i];
}

void Solve()
{
    sort(b + 1, b + n);
    for (int i = n - 1; i >= n - k + 1; --i)
        a[n] -= b[i];
    cout << a[n] + k - 1;
}

int32_t main()
{
    //ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t(1);
    if (typetest)
        cin >> t;
    for (int _ = 1; _ <= t; ++_)
    {
        Read();
        Solve();
    }
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50