Submission #1050722

#	Time	Username	Problem	Language	Result	Execution time	Memory
1050722		fryingduc	Stove (JOI18_stove)	C++17	100 / 100	12 ms	2288 KiB

stove

#include "bits/stdc++.h"
using namespace std;

const int maxn = 1e5 + 5;

int n, k;
int a[maxn];
void solve() {
    cin >> n >> k;
    vector<int> b;
    for(int i = 1; i <= n; ++i) {
        cin >> a[i];
    }
    for(int i = 1; i < n; ++i) {
        b.push_back(a[i] - a[i + 1]);
    }
    sort(b.begin(), b.end());
    
    long long ans = a[n] - a[1] + k;
    for(int i = 0; i < k - 1; ++i) {
        ans += b[i];
    }
    
    cout << ans;
}
signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    
    solve();
    return 0;
}

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