Submission #772326

#	Time	Username	Problem	Language	Result	Execution time	Memory
772326		Alfraganus	Stove (JOI18_stove)	C++14	100 / 100	16 ms	2872 KiB

stove

#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
using namespace std;
// using namespace __gnu_pbds;

// typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;

#define int long long
#define str string
#define fastio ios::sync_with_stdio(0), cin.tie(0);
#define fs first
#define ss second
#define endl '\n'
#define all(x) (x).begin(), (x).end()
#define len(x) x.size()

#define print(a)          \
    for (auto &x : a)     \
        cout << x << " "; \
    cout << endl;

#define printmp(a)    \
    for (auto &x : a) \
        cout << x.fs << " " << x.ss << endl;

const int mod = 1e9 + 7;
const long long INF = LLONG_MAX;
const long long NEG_INF = LLONG_MIN;

void solve()
{
    int n, k;
    cin>>n>>k;
    vector<int> a(n);
    for(int i = 0; i < n; i ++)cin>>a[i];
    vector<int> diff(n - 1);
    for(int i = 0; i < n - 1; i ++)diff[i] = a[i + 1] - a[i] + 1;
    int ans = n;
    sort(all(diff));
    for(int i = 0; i < n - k; i ++)ans += diff[i], ans -= 2;
    cout<<ans;
}

signed main()
{
    fastio int t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
        cout << endl;
    }
}

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