Submission #958917

#	Time	Username	Problem	Language	Result	Execution time	Memory
958917		vjudge1	Stove (JOI18_stove)	C++14	20 / 100	2 ms	2648 KiB

stove

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define all(x) x.begin(), x.end()
#define nl '\n'
#define deb(x) cout << #x << ": " << x << nl;
ll ps[1<<18];
ll arr[1<<18];

void solve()
{
    ll n, k; cin >> n >> k;
    for (ll i = 1; i <= n; i++)
    {
        cin >> arr[i];
    }
    sort(arr+1, 1+arr+n);
    for (ll i = 1; i <= n; i++)
        ps[i] = -arr[i] + arr[i-1];
        
    sort (ps+1, ps+1+n);
    ll suma = arr[n]+1 - arr[1];
    //deb(suma);
    for (ll i = 1; i < k; i++)
    {
        //deb(ps[i]-1);
        suma += ps[i]+1;
    }
    cout << suma << nl;
}
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    ll t = 1; //cin >> t;
    while (t--)
        solve();
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50