Submission #489309

#	Time	Username	Problem	Language	Result	Execution time	Memory
489309		1ne	Stove (JOI18_stove)	C++14	100 / 100	21 ms	3232 KiB

stove

#include<bits/stdc++.h>
using namespace std;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n,m;cin>>n>>m;
vector<int64_t>arr(n);
for (int i = 0;i<n;++i)cin>>arr[i];
if (m>=n){
	cout<<n<<'\n';
}
else{
	int k = n - m;
	vector<int64_t>brr;
	int64_t ans = 0;
	for (int i = 0;i<n-1;++i){
		brr.push_back({arr[i+1]-arr[i]});
	}
	sort(brr.begin(),brr.end());
	for (int i = 0;i<k;++i){
		ans+=brr[i];
	}
	ans+= n - k;
	cout<<ans<<'\n';
}
return 0;}

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