Submission #704523

#	Time	Username	Problem	Language	Result	Execution time	Memory
704523		KenIsGenius	Stove (JOI18_stove)	C++17	100 / 100	25 ms	3164 KiB

stove

#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define int long long
using namespace std;

#ifdef LOCAL
#define WOSAOJI freopen("in.txt", "r", stdin);
#else
#define WOSAOJI ios_base::sync_with_stdio(0), cin.tie(0);
#endif

#define chmax(a, b) (a) = (a) > (b) ? (a) : (b)
#define chmin(a, b) (a) = (a) < (b) ? (a) : (b)

const int MAXN = 1e5 + 5;
int n, k;
int a[MAXN];

signed main() {
    WOSAOJI
    cin >> n >> k;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    priority_queue<int> pq;
    for (int i = 2; i <= n; i++) {
        pq.push(a[i] - a[i - 1] - 1);
    }
    int ans = a[n] - a[1] + 1;
    k--;
    while (k--) {
        ans -= pq.top();
        pq.pop();
    }
    cout << ans << '\n';
}

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