Submission #1033948

#	Time	Username	Problem	Language	Result	Execution time	Memory
1033948		vjudge1	Stove (JOI18_stove)	C++17	100 / 100	15 ms	2988 KiB

stove

#include<bits/stdc++.h>
#define ll long long
using namespace std;

const int MAXN = 1e5 + 5;

ll n,k,res;
ll a[MAXN],pre[MAXN];

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    cin>>n>>k;
    for(int i = 1;i<=n;i++) cin>>a[i];
    for(int i = 2;i<=n;i++){
        pre[i] = a[i] - a[i-1];
    }
    sort(pre+2,pre+n+1);
    if(k == n){
        res = n;
    }
    else{
        for(int i = 1;i<=n-k;i++){
            res += pre[i+1];
        }
        res += k;
    }
    cout<<res;

    return 0;
}

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