Submission #686747

#	Time	Username	Problem	Language	Result	Execution time	Memory
686747		qweasdzxc	Stove (JOI18_stove)	C++14	100 / 100	26 ms	2264 KiB

stove

#include <bits/stdc++.h>
#define fastio                    \
	ios_base::sync_with_stdio(0); \
	cin.tie(0);
#define vi vector<int>
#define vl vector<long long>
#define vc vector<char>
#define vs vector<string>
#define pi pair<int, int>
#define pl pair<ll, ll>
#define vp vector<pi>
#define vpl vector<pl>
#define ll long long
#define MAX 2147000000
#define MOD 1000000007
using namespace std;

int main(){
	fastio;
    int n, k;
    cin >> n >> k;
    vi vec(n);
    for(int i{0}; i < n; ++i){
        cin >> vec[i];
    }
    vi A;
    for(int i{0}; i < n - 1; ++i){
        A.push_back(vec[i + 1] - vec[i] - 1);
    }
    sort(A.begin(), A.end());
    if(k >= n) cout << n;
    else{
        int ans{n};
        for(int i{0}; i < n - k; ++i){
            ans += A[i];
        }
        cout << ans;
    }
}

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