Submission #659319

#	Time	Username	Problem	Language	Result	Execution time	Memory
659319		illyakr	Stove (JOI18_stove)	C++14	100 / 100	44 ms	3196 KiB

stove

#include <iostream>
#include <vector>
#include <algorithm>
#define int long long

using namespace std;

int n, k;
int t[101010];
int res = 0;
vector<int> dif;
int32_t main()
{
    cin >> n >> k;
    for (int i = 1; i <= n; i++)
        cin >> t[i];
    for (int i = 2; i <= n; i++) {
        dif.push_back(t[i] - t[i - 1]);
    }
    res = t[n] - t[1] + 1;
    sort(dif.begin(), dif.end(), greater<int>());
    for (int i = 0; i + 1 < k; i++) {
        res -= dif[i];
        res++;
    }
    cout << res;
}

/**
3 2
1
3
6

3 1
1
3
6

10 5
1
2
5
6
8
11
13
15
16
20
*/

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