Submission #946386

#	Time	Username	Problem	Language	Result	Execution time	Memory
946386		Khanhcsp2	Stove (JOI18_stove)	C++14	100 / 100	45 ms	4748 KiB

stove

#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=5e5+5;
int arr[N];
vector<int>v;
signed main(){
    int n,k;
    cin>>n>>k;
    for(int i=1;i<=n;i++)cin>>arr[i];
    int ans=arr[n]-arr[1];
    for(int i=1;i<n;i++){
        v.pb(arr[i+1]-arr[i]);
    }
    sort(v.begin(),v.end());
    reverse(v.begin(),v.end());
    k--;
    for(int i=0;i<k;i++){
        ans-=v[i];
    }
    cout<<ans+k+1;
}

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