Submission #409972

#	Time	Username	Problem	Language	Result	Execution time	Memory
409972		jenkinsser	Stove (JOI18_stove)	C++17	100 / 100	27 ms	2212 KiB

stove

#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define st first
#define nd second
#define pii pair<int,int>
#define piii pair<int,pii>
#define sp " "
#define nl "\n"
#define all(x) x.begin(),x.end()
#define fastio() ios_base::sync_with_stdio(0);cin.tie(0);
#define ll long long
 
using namespace std;
 
const int N = 1e5+5;
const int INF = 1e9+5;
const int mod = 1e9+7;

int n,k,a[N],ans;

signed main(){
    fastio()
    cin >> n >> k;
    vector<int> v;
    for(int i=1;i<=n;i++){
        cin >> a[i];
        if(i>1){
            ans+=a[i]-a[i-1];
            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+k << nl;
}

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