// Written by Rustam Mammadli
#include <bits/stdc++.h>
using namespace std;
#define allblue ios_base::sync_with_stdio(false); cin.tie(NULL); std::cout.tie(NULL);
#define pr cout<<
#define e <<'\n'
#define inp cin>>
#define ll long long
#define ve vector
#define mset multiset
#define unset unordered_set
#define unmset unordered_multiset
#define mmap multimap
#define unmap unordered_map
#define ret return
#define pb push_back
#define ins insert
#define rev reverse
#define proqg priority_queue<int, ve<int>, greater<pair<int, int>>>
#define proq priority_queue
#define inpv(v) for(auto &random : v) cin >> random;
#define vbe(v) v.begin(), v.end()
#define fr first
#define sec second
#define enough return 0;
#define testcase int asddgh; cin >> asddgh; while(asddgh--)
#define testcasef for(int asdgh = 0; asdgh < 1; asdgh++)
#define cint int n; cin >> n;
#define clong long long n; cin >> n;
#define no pr "NO" e;
#define yes pr "YES" e;
#define f << " "
#define answer pr ans e
#define vi v[i]
#define vj v[j]
#define forn for(int i = 0;i < n;++i)
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vint vector<int>
#define vlong vector<long long>
#define vii vector<pair<int, int>>
#define vll vector<pair<long long, long long>>
#define vstr vector<string>
#define vch vector<char>
#define vvint vector<vint>
#define vvlong vector<vlong>
#define zero = 0
#define one = 1
#define is ==
#define isnot !=
#define wh while
#define br break
#define sz size()
#define con continue
#define mt empty()
#define gr greater
#define lb lower_bound
#define ub upper_bound
#define en end()
#define bg begin()
#define fori(i, leftt, rightt, multipiler) for(int i = leftt; i < rightt;i += multipiler)
#define er erase
#define elif else if
#define str string
#define ch char
#define bck back()
#define tp top()
#define xy long long x,y; inp x >> y
#define si s[i]
#define sj s[j]
#define ss substr
#define in :
#define db double
#define sp setprecision
#define sint set<int>
#define slong set<ll>
#define msint mset<int>
#define mslong mset<ll>
#define maxv max_element
#define minv min_element
#define ap append
#define popb pop_back()
#define llmax LLONG_MAX
#define intmax INT_MAX
#define mint int m; inp m;
#define mlong ll m; inp m;
#define kint int k; inp k;
#define klong ll k; inp k;
#define ai a[i]
#define aj a[j]
#define bi b[i]
#define bj b[j]
#define vij v[i][j]
#define vji v[j][i]
/* ⠀⠀⠀⣠⡶⠟⠛⠻⢶⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⡶⠛⠛⠻⢶⣄⠀⠀⠀⠀
⠀⠀⠀⠀⣼⠏⠀⠀⠀⠀⠀⢹⡆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣠⣤⣤⣤⣤⣤⣤⣤⣤⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣼⠋⠀⠀⠀⠀⠀⢻⡆⠀⠀⠀
⠀⣀⣤⠶⠿⠀⠀⠀⠀⠀⠀⣿⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣴⠾⠛⠉⠉⠀⠀⠀⠀⠀⠀⠀⠀⠉⠙⠛⢶⣤⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢿⡄⠀⠀⠀⠀⠀⠸⠷⠶⣤⡀
⣴⠟⠁⠀⠀⠀⠀⠀⠀⠀⠙⢿⣄⠀⠀⠀⠀⠀⠀⠀⢀⣴⠟⠋⢀⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢙⠷⣦⡀⠀⠀⠀⠀⠀⠀⠀⣩⡿⠓⢀⠀⠀⠀⠀⠀⠀⠈⢻
⣿⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⣷⡄⠀⠀⠀⠀⣴⡟⠁⠀⣴⣿⠋⣶⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣴⠀⠀⣿⣮⠈⢻⣦⠀⠀⠀⠀⢠⣾⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸
⠹⣧⡀⠀⠀⠀⢠⣆⠀⠀⠀⠀⠀⠈⠻⣦⡀⢀⡾⠋⠀⣠⣾⠟⢡⣾⠟⢀⣼⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⢿⣷⡀⠈⢻⣦⡀⠻⣧⡀⣠⡼⠋⠁⠀⠀⠀⠀⠀⣀⠀⠀⠀⠀⢀⣼
⠀⠈⠻⠶⠶⠾⠛⠙⢷⣆⡀⠀⠀⠀⠀⠈⢹⡿⠁⠀⠀⡟⡁⠰⡿⠃⣠⢿⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢙⢿⣄⠀⡹⣿⡄⢸⣿⡋⠀⠀⠀⠀⠀⢀⣴⡞⠋⠛⠶⠶⠶⠛⠁
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⢷⣤⡀⠀⠀⢠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⠀⠀⠀⢀⣴⠟⠁⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠻⣦⡀⣼⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⢀⣴⠟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⢀⣀⣀⣀⣀⣀⣀⣈⣻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣛⣁⣀⣀⣀⣀⣀⣀⡀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⢸⡟⢯⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⢻⡆⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠘⠿⠾⠶⠶⠶⠶⠶⠶⢶⣷⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⠶⣶⠶⠶⠶⠶⠶⠶⠶⠶⠟⠁⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⡀⠀⠀⠀⠀⠀⠀⣠⣴⣾⣶⣶⣦⣀⠀⠀⠀⠀⠀⢀⠀⣠⣴⣾⣶⣶⣤⡀⠀⠀⠀⠀⠀⢰⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⣧⠀⠀⠀⠀⢈⣾⣿⣿⣿⣿⣿⣿⣿⣆⠀⠀⠀⠀⢬⣾⣿⣿⣿⣿⣿⣿⣿⣦⠀⠀⠀⠠⣿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⣾⡀⠀⠀⣹⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⢰⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠀⢀⣸⡏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢿⣥⠀⠀⠹⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⠀⠀⠈⠾⣿⣿⣿⣿⣿⣿⣿⣿⡿⠀⠈⣰⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠻⣮⠀⠀⠙⢿⣿⣿⣿⣿⣿⠟⠁⠀⠀⠀⠀⠀⠙⢿⣿⣿⣿⣿⣿⠟⠁⢀⣼⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⠿⣤⡀⠀⠈⠉⡉⠉⠀⠀⠀⣠⣤⣤⣆⠀⠀⠀⠈⠉⠙⠉⠀⢀⣴⠟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢈⣿⣷⣄⣀⠀⠀⠀⠀⠀⠻⠿⠿⠛⠀⠀⠀⠀⠀⣀⣤⡾⣯⡑⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⡶⠋⣱⡟⠈⠙⠻⢶⣦⣤⣤⣤⣤⣄⣤⣤⣤⢶⡾⠛⠋⠁⢿⡌⠻⣦⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⡾⠋⠀⢠⣿⣄⡀⠀⠀⣾⠀⠀⠀⠠⣹⡏⠀⠀⠀⢸⣇⠀⠀⢀⣼⣷⠀⠈⠻⢦⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⡾⠋⠀⠀⢀⢸⡇⠉⠛⠳⢦⣿⣄⣀⣀⣀⣸⣇⣀⣀⣠⣬⣿⠶⠞⠋⠁⢼⡆⠀⠀⠀⠙⢷⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⣠⡶⠶⠳⠶⣦⣴⠞⠋⠀⠀⠀⠀⢸⣸⣯⡀⠀⠀⢰⡇⠈⠉⠉⠉⣹⡏⠉⠉⠁⠀⣿⠀⠀⠀⢀⣼⡇⠀⠀⠀⠀⠀⠙⢷⣤⡴⠾⠳⠶⣦⡀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⣼⠏⠀⠀⠀⠀⠘⠁⠀⠀⠀⠀⠀⣠⡿⢻⡏⠛⢶⣤⣸⣇⡀⠀⠀⠀⢸⡇⠀⠀⠀⢀⣻⣆⣤⠾⠋⣹⡿⣦⡀⠀⠀⠀⠀⠀⠉⠀⠀⠀⠀⠈⢻⡆⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⣿⠠⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣼⠟⠣⢸⣇⠀⠀⠀⠛⠛⠿⠿⠿⠿⠿⠿⠿⠿⠿⠿⠛⠛⠀⠀⠀⣼⠇⠘⢿⣇⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⡇⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠹⣧⣂⠀⠀⠀⠀⠀⠀⠀⠰⣿⡁⠀⠀⢪⣿⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⡿⡀⠀⠁⢩⡿⠂⠀⠀⠀⠀⢀⠀⠀⣴⣾⠃⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠈⠛⠻⣾⠀⠀⠀⠀⠀⠀⢸⡷⠀⠀⠈⠹⣧⣆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⡿⠃⠀⠀⠸⣿⡁⠀⠀⠀⠀⠀⢸⡷⠟⠋⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⣆⠀⠀⠀⠀⢀⣼⠇⠀⠀⠀⠀⠙⢷⣤⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣴⠟⠁⠀⠀⠀⠀⡹⣧⠀⠀⠀⠀⢀⣼⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⢙⡻⢶⠶⠶⢟⣁⠀⠀⠀⠀⠀⠀⠀⠈⣙⠳⠶⣤⣤⣤⣤⣤⣤⣤⡴⠶⣛⣋⠁⠀⠀⠀⠀⠀⠀⠁⢙⡻⠶⡶⠶⣟⠁*/
int main(){
allblue
testcasef{
cint; kint;
k = n - k;
vlong v(n), a; inpv(v);
forn{
if(i is 0) con;
a.pb(vi - v[i - 1] - 1);
}
int ans = n;
sort(vbe(a));
int i = 0;
wh(k--){
ans += ai;
i++;
}
answer;
}
cout e;
cerr << "Written by Rustam Mammadli";
}
