Submission #1313507

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313507		prunjuice	Stove (JOI18_stove)	C++20	100 / 100	15 ms	1996 KiB

stove

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define MAX LLONG_MAX
#define MIN LLONG_MIN
#define fi first
#define se second
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define pf push_front
const int mod = 1e9 + 7;
signed main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n, m;
    cin >> n >> m;
    int ans = 0;
    vector <int> v (n);
    vector <int> v2 (n - 1);
    for (int i = 0; i < n; i++){
        cin >> v[i];
    }
    sort (v.begin(), v.end());
    for (int i = 0; i < n - 1; i++){
        v2[i] = v[i + 1] - v[i] + 1;
    }
    sort (v2.begin(), v2.end());
    if (m == 1){
        cout << v[n - 1] - v[0] + 1 << endl;
    }
    else {
        for (int i = 0; i < n - m; i++){
            ans += v2[i];
        }
        ans += m - (n - m);
        cout << ans << endl;
    }
}

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