Submission #1132316

#	Time	Username	Problem	Language	Result	Execution time	Memory
1132316		g4yuhg	Stove (JOI18_stove)	C++20	100 / 100	20 ms	1880 KiB

stove

//Huyduocdithitp
#include <bits/stdc++.h>
typedef long long ll;
#define endl '\n'
#define yes cout<<"YES"<<endl;
#define no cout<<"NO"<<endl;
#define fi first
#define se second
#define pii pair<ll, ll>
#define inf 1e18
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MP make_pair
#define TASK "ghuy4g"
#define start if(fopen(TASK".inp","r")){freopen(TASK".inp","r",stdin);freopen(TASK".out","w",stdout);}
#define LOG 19
#define N 500005
using namespace std;
ll n, k;
ll a[N], b[N], f[N];
signed main(void) {
    faster;
    cin >> n >> k;
    for (int i = 1; i <= n; i ++) {
        cin >> a[i];
        f[i] = a[i] - a[i - 1] - 1;
    }
    sort(f + 2, f + 1 + n);
    ll ans = n;
    ll left = n - k;
    for (int i = 2; i <= 2 + left - 1; i ++) {
        ans += f[i];
    }
    cout << ans;
    return 0;
}

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