Submission #1355841

#	Time	Username	Problem	Language	Result	Execution time	Memory
1355841		vjudge1	Stove (JOI18_stove)	C++20	100 / 100	25 ms	1808 KiB

stove

#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long n, k, sum = 0;
    cin>>n>>k;
    long long a[n];
    vector<int>v;
    for(long long i = 0; i < n; i++)
    {
        cin>>a[i];
        sum+=1;
        if(i > 0)
        {
            v.push_back(a[i]-(a[i-1]+1));
            sum+=a[i]-a[i-1]-1;
        }
    }
    if(k == 1)
    {
        cout<<*max_element(a, a+n)+1 - *min_element(a, a+n);
    }
    else
    {
        sort(v.rbegin(), v.rend());
        k--;
        for(auto p:v)
        {
            if(k > 0)
            {
                k-=1;
                sum-=p;
            }
        }
        cout<<sum<<endl;
    }
}

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