Submission #685675

#	Time	Username	Problem	Language	Result	Execution time	Memory
685675		Bliznetc	Stove (JOI18_stove)	C++17	100 / 100	46 ms	6416 KiB

stove

#include <bits/stdc++.h>

#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC target("avx2")

using namespace std;

#define pb push_back
#define sz size()
#define all(x) x.begin(), x.end()
#define F first
#define S second

typedef pair < int, int > pii;
typedef vector < int >  vi;
typedef vector < vi >  vvi;


void solve(){
    int n, k;
    cin >> n >> k;
    int a[n + 7];
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }

    multiset <int> s;
    for (int i = 2; i <= n; i++) {
        int diff = a[i] - a[i - 1];
        s.insert(diff - 1);
    }

    k--;
    while (s.sz > 0 && k > 0) {
        s.erase(--s.end());
        k--;
    }

    int ans = 0;
    for (auto i : s) {
//        cout << i << " ";
        ans += i;
    }
    ans += n;
    cout << ans;
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    int t = 1;
//    cin >> t;
    while (t--) {
        solve();
        cout << "\n";
    }
}

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