Submission #1098616

#	Time	Username	Problem	Language	Result	Execution time	Memory
1098616		flyingkite	Stove (JOI18_stove)	C++17	100 / 100	21 ms	3092 KiB

stove

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define pll pair<long long, long long>
#define pb push_back
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
 
const ll N = 2e5 + 100;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const ll block = 480;
ll n,k;
ll a[N];
void to_thic_cau(){
    cin >> n >> k;  
    vector<ll>v;
    for(int i = 1; i <= n;i++){
        cin >> a[i];
        if(i >= 2) v.pb(a[i] - a[i-1] - 1);
    }
    ll s = a[n] - a[1] + 1;
    sort(all(v));
    k--;
    while(v.size() > 0 && k > 0){
        s -= v.back(); v.pop_back();
        k--;
    }
    cout << s << '\n';
}
 
signed main(){
 
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ll tc = 1;
    //cin >> tc;
    while(tc--) to_thic_cau();
}

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