Submission #1144733

#	Time	Username	Problem	Language	Result	Execution time	Memory
1144733		why1	Stove (JOI18_stove)	C++20	100 / 100	13 ms	2244 KiB

stove

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

#define ll long long
#define pb push_back
#define pii pair<int,int>
#define sz size()
#define all(v) v.begin(),v.end()
#define fi first
#define se second

const int N = 2e5;
const int mod = 1e9+7;
const ll INF = 1e18;

const int di[] = {1, -1, 0, 0};
const int dj[] = {0, 0, 1, -1};

void solve() {
	int n,k;
	cin>>n>>k;
	ll a[n+1];
	for(int i = 1; i <= n; i++){
		cin>>a[i];
	}
	ll ans=a[n]-a[1]+k;
	vector<ll> v;
	for(int i = 2; i <= n; i++){
		v.pb(a[i]-a[i-1]);
	}
	sort(v.rbegin(),v.rend());
	for(int i = 0; i < k-1; i++){
		ans-=v[i];
	}
	cout<<ans<<"\n";
}

int main() {

	//freopen("cowrun.in","r",stdin);
	//freopen("cowrun.out","w",stdout);

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

	int t=1;
	//cin>>t;
	while(t--) {
        solve();
	}

    return 0;
}

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