Submission #270516

#	Time	Username	Problem	Language	Result	Execution time	Memory
270516		REALITYNB	Stove (JOI18_stove)	C++14	100 / 100	99 ms	3312 KiB

stove

#include <bits/stdc++.h> 
#define int long long 
using namespace std;
signed main(){
	int n ; 
	int k ; 
	cin>> n >>k ; 
	vector<int>  a(n) ; 
	for(int& x : a) cin>>x ; 
	int ans = 0 ; 
	for(int i=1;i<n;i++) ans+=a[i]-a[i-1]-1 ; 
	vector<int> b  ; 
	for(int i=1;i<n;i++){
		b.push_back(a[i-1]-a[i]+1) ; 
	}
	sort(b.begin(),b.end()) ; 
	for(int i=0;i<k-1;i++){
		b[i]*=-1 ; 
		ans-=b[i] ; 
	}
	cout << ans+n  ;
	return 0 ; 
}

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