Submission #227376

#	Time	Username	Problem	Language	Result	Execution time	Memory
227376		Nayna	Stove (JOI18_stove)	C++14	100 / 100	84 ms	3288 KiB

stove

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int mxn = 5e5+5;
typedef pair<ll,ll>pii;

ll arr[mxn];
vector<ll>gap;

int main()
{
    ll n, k;
    cin >> n >> k;

    for(int i = 1; i <= n; i++) cin >> arr[i];
    for(int i = 1; i < n; i++) gap.push_back(arr[i+1]-arr[i]-1);
    sort(gap.rbegin(), gap.rend());
    ll ans  = arr[n]-arr[1]+1;
    for(int i = 0; i < k-1; i++) ans-=gap[i];
    cout << ans << '\n';
    return 0;
}

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