Submission #971224

#	Time	Username	Problem	Language	Result	Execution time	Memory
971224		vyshniak_n	Stove (JOI18_stove)	C++17	100 / 100	16 ms	3544 KiB

stove

//#pragma optimize("Ofast")
//#pragma optimize("unroll-loops")
//#pragma target("avx,avx2")

#include <iostream>
#include <cmath>
#include <algorithm>
#include <stdio.h>
#include <cstdint>
#include <cstring>
#include <string>
#include <cstdlib>
#include <vector>
#include <bitset>
#include <map>
#include <queue>
#include <ctime>
#include <stack>
#include <set>
#include <list>
#include <random>
#include <deque>
#include <functional>
#include <iomanip>
#include <sstream>
#include <fstream>
#include <complex>
#include <numeric>
#include <cassert>
#include <array>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <thread>

typedef long long ll;
typedef long double ld;

using namespace std;

#define el '\n'
#define ff first
#define ss second
#define pb push_back
#define popb pop_back
#define point pair <ll, ll>
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()

const ll N = 1e5 + 10;
const ll INF = 2e18 + 10;
const ll inf = 2e9 + 10;

void solve() {
    ll n, k;
    cin >> n >> k;

    vector <ll> t(n);
    for (ll i = 0; i < n; i++)
        cin >> t[i];

    vector <ll> b;
    ll ans = n;

    for (ll i = 1; i < n; i++)
        b.pb(t[i] - t[i - 1] - 1);

    sort(all(b));
    for (ll i = 0; i < n - k; i++)
        ans += b[i];

    cout << ans << el;
    return;
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int tests = 1;
    //cin >> tests;

    while (tests--)
        solve();
    return 0;
}

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