Submission #336930

#	Time	Username	Problem	Language	Result	Execution time	Memory
336930		erke	Stove (JOI18_stove)	C++11	100 / 100	22 ms	2304 KiB

stove

#include <bits/stdc++.h>
using namespace std;

#define int long long

const int N = 100005;

int a[N];

signed main() {
  // freopen("in" , "r", stdin );
  cin.tie(0)->sync_with_stdio(0);
  int n, k;
  cin >> n >> k;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
  }
  vector<int> v;
  for (int i = 2; i <= n; i++) {
    v.push_back(a[i] - a[i - 1] - 1);
  }
  sort(v.begin(), v.end(), greater<int>());
  int ans = a[n] + 1 - a[1];
  for (int i = 0; i < k - 1; i++) {
    ans -= v[i];
  }
  cout << ans << '\n';
}

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