Submission #126672

#	Time	Username	Problem	Language	Result	Execution time	Memory
126672		toonewbie	Stove (JOI18_stove)	C++17	100 / 100	25 ms	2424 KiB

stove

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

#define ll long long
#define F first
#define S second
#define pb push_back
#define endl '\n'
#define all(v) (v).begin(),(v).end()

using namespace std;

const int N = 100005;

int a[N];
int main() {
    ios_base :: sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int n, k;
    cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    vector <int> difs;
    for (int i = 2; i <= n; i++) {
        difs.pb(a[i] - a[i - 1]);
    }
    sort(all(difs));
    int res = k;
    for (int i = 0; i < n - k; i++) {
        res += difs[i];
    }
    cout << res << endl;
    return 0;
}

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