Submission #807115

#	Time	Username	Problem	Language	Result	Execution time	Memory
807115		annabeth9680	Stove (JOI18_stove)	C++17	100 / 100	42 ms	2252 KiB

stove

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

int main()
{
    int N,K; cin >> N >> K;
    vector<ll> arr(N);
    for(int i = 0;i<N;++i) cin >> arr[i];
    vector<ll> diff; ll ans = 0;
    for(int i = 0;i<N-1;++i){
        diff.push_back(arr[i+1]-arr[i]-1);
    }
    K--; ans = arr[N-1]-arr[0]+1;
    //cout << ans << "\n";
    sort(diff.begin(),diff.end()); int i = diff.size()-1;
    while(K > 0 && i >= 0){
        ans -= diff[i];
        K--; i--;
    }
    cout << ans << "\n";
    return 0;
}

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