Submission #1191798

#	Time	Username	Problem	Language	Result	Execution time	Memory
1191798		lukasuliashvili	Stove (JOI18_stove)	C++20	100 / 100	30 ms	2068 KiB

stove

// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
using namespace std;
#define int long long 
const int N=2000005;
int a[N],b[N],sum;
signed main() {
    int n;cin>>n; int k ; cin>>k;
    int mx,mn;
    for(int i=1; i<=n; i++){
        cin>>a[i];
    }
    int idx=1;
    for(int i=1; i<=n-1; i++){
        b[idx]=abs(a[i]-a[i+1])-1;
        idx++;
    }
    sort(b+1,b+n);
    reverse(b+1,b+n);
    for(int i=1; i<k; i++){
        sum+=b[i];
    }
    cout<<a[n]-a[1]-sum+1;
    // 1 89 90 100 
}

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