Submission #811038

#	Time	Username	Problem	Language	Result	Execution time	Memory
811038		manhlinh1501	Stove (JOI18_stove)	C++17	100 / 100	19 ms	3236 KiB

stove

/// @author : Hoang Manh Linh
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 1e5 + 5;
using i64 = long long;

#define eb emplace_back
#define all(a) a.begin(), a.end()

int TC;
int n, k;
i64 a[MAXN];

int main(int argc, char **argv) {

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    TC = 1;

    while(TC--) {
        cin >> n >> k;

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

        vector<i64> res;

        for(int i = 2; i <= n; i++)
            res.eb(a[i] - a[i - 1] - 1);

        sort(all(res));
        i64 ans = n;

        for(int i = 0; i < n - k; i++)
            ans += res[i];

        cout << ans << "\n";
    }
}

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