Submission #756190

#	Time	Username	Problem	Language	Result	Execution time	Memory
756190		thinknoexit	Stove (JOI18_stove)	C++17	100 / 100	19 ms	2132 KiB

stove

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int a[100100];
int b[100100];
int main() {
    cin.tie(nullptr)->sync_with_stdio(false);
    int n, k;
    cin >> n >> k;
    for (int i = 1;i <= n;i++) {
        cin >> a[i];
    }
    for (int i = 1;i < n;i++) {
        b[i] = a[i + 1] - a[i];
    }
    sort(b + 1, b + n, greater<int>());
    int mn = a[n] - a[1] + 1;
    int now = a[n] - a[1] + 1;
    for (int i = 2;i <= k;i++) {
        now -= b[i - 1];
        now++;
        mn = min(mn, now);
    }
    cout << mn << '\n';
    return 0;
}

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