Submission #1339499

#	Time	Username	Problem	Language	Result	Execution time	Memory
1339499		chry	Stove (JOI18_stove)	C++20	100 / 100	13 ms	1480 KiB

stove

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

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n, k;
    cin >> n >> k;

    vector<int> T(n+1);
    for (int i = 1; i <= n; i++) cin >> T[i];

    if (k >= n) {
        cout << n << '\n';
        return 0;
    }

    vector<int> gap;
    for (int i = 2; i <= n; i++) gap.push_back(T[i] - T[i-1]);
    
    sort(gap.rbegin(), gap.rend());

    long long ans = T[n] - T[1] + 1;

    for (int i = 0; i < k-1; i++) {
        ans -= (gap[i] - 1);
    }

    cout << ans << '\n';

    return 0;
}

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