Submission #1211043

#	Time	Username	Problem	Language	Result	Execution time	Memory
1211043		namhh	Stove (JOI18_stove)	C++20	In queue	0 ms	0 KiB

stove

#include<bits/stdc++.h>
using namespace std;
const int N = 1e5+1;
int a[N],n,k,b[N];
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	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];
	sort(a+1,a+n+1);
	int sum = a[n]-a[1]+1;
    sort(b+1,b+n);
    for(int i = n-1; i >= n-k+1; i--) sum -= (b[i]-1);
    cout << sum;
}