Submission #1282007

#	Time	Username	Problem	Language	Result	Execution time	Memory
1282007		okahak71	Stove (JOI18_stove)	C++20	100 / 100	15 ms	2252 KiB

stove

#include <bits/stdc++.h>
#define all(X) X.begin(), X.end()
#define allr(X) X.rbegin(), X.rend()
#define ll long long
#define pb push_back
#define ins insert
#define vec vector
using namespace std;

const ll N = 2e5 + 5;
const ll inf = 1e10;

void _(){
    ll n, k; cin >> n >> k;
    vec<ll>a(n); vec<ll>v;
    for(ll i = 0; i < n; i++){
        cin >> a[i];
        if(!i) continue ;
        v.pb(a[i] - a[i - 1] - 1);
    }
    ll ans = n;
    sort(all(v));
    for(ll i = 0; i < n - k; i++) ans += v[i];
    cout << ans << endl;
}

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); _();
}

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