Submission #477456

#	Time	Username	Problem	Language	Result	Execution time	Memory
477456		FireGhost1301	Stove (JOI18_stove)	C++11	100 / 100	26 ms	2332 KiB

stove

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

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()

typedef long long ll;
typedef pair<int, int> pii;

const int N = 1e5 + 3;
int n, k, a[N];

void solve() {
    cin >> n >> k;
    for (int i = 1; i <= n; ++i)
        cin >> a[i];
    vector<int> tmp;
    int ans = a[n] - a[1];
    for (int i = 1; i < n; ++i)
        tmp.pb(a[i + 1] - a[i]);
    sort(all(tmp), greater<int> ());
    for (int i = 0; i < k - 1; ++i)
        ans -= tmp[i];
    cout << ans + k;
}

int main() {
    cin.tie(NULL);
    ios_base::sync_with_stdio(false);
    solve();
    return 0;
}

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