Submission #948725

#	Time	Username	Problem	Language	Result	Execution time	Memory
948725		phoenix0423	Stove (JOI18_stove)	C++17	100 / 100	19 ms	2664 KiB

stove

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pll;
#define fastio ios::sync_with_stdio(false), cin.tie(0)
#define pb push_back
#define eb emplace_back
#define f first
#define s second
#define lowbit(x) x&-x
const int maxn = 2e5 + 5;

signed main(void){
	fastio;
	int n, k;
	cin>>n>>k;
	vector<int> a(n);
	for(int i = 0; i < n; i++) cin>>a[i];
	int ans = n;
	vector<int> val;
	for(int i = 1; i < n; i++) val.pb(a[i] - a[i - 1] - 1);
	sort(val.begin(), val.end());
	int use = n - k;
	for(int i = 0; i < use; i++) ans += val[i];
	cout<<ans<<"\n";
}

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