Submission #1313978

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313978		chithanhnguyen	Stove (JOI18_stove)	C++20	100 / 100	17 ms	2232 KiB

stove

/*
Author: Nguyen Chi Thanh - High School for the Gifted - VNU.HCM (i2528)
*/
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ull unsigned long long
#define ld long double
#define pii pair<int, int>
#define fi first
#define se second
#define __builtin_popcount __builtin_popcountll
#define all(x) (x).begin(), (x).end()
#define BIT(x, i) (((x) >> (i)) & 1)
#define MASK(x) ((1ll << (x)))

#define debug(a, l, r) for (int _i = (l); _i <= (r); ++_i) cout << (a)[_i] << ' '; cout << '\n';

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

void init() {
    cin >> n >> k;
    for (int i = 1; i <= n; ++i) cin >> a[i];
}

void solve() {
    int sum = n;
    priority_queue<int, vector<int>, greater<int>> pq;
    for (int i = 1; i < n; ++i) pq.push(a[i + 1] - a[i] - 1);

    int joiner = n - 1;
    while (joiner > k - 1) {
        sum += pq.top();
        pq.pop();
        --joiner;
    }

    cout << sum;
}

signed main() {
    #ifdef NCTHANH
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);

    init();
    solve();

    return 0;
}

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