Submission #1130584

#	Time	Username	Problem	Language	Result	Execution time	Memory
1130584		lopkus	Stove (JOI18_stove)	C++20	100 / 100	17 ms	2244 KiB

stove

#include <bits/stdc++.h>

#define int long long

using namespace std;

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, k;
    cin >> n >> k;
    vector<int> a(n + 1);
    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]);
    }
    sort(V.begin(), V.end());
    if(k >= n) {
        cout << n;
        return 0;
    }
    if(k == 1) {
        cout << a[n] + 1 - a[1];
        return 0;
    }
    int ans = 0;
    for(int i = 0; i < n - k; i++) {
        ans += V[i];
    }
    cout << ans + k;
}

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