Can someone explain why this code is not clearing all test cases:

include

define ll long long int

using namespace std;

ll fairCut(int k, vector arr) { int n = arr.size(); vector> dp(n+1, vector (k+1, LLONG_MAX));

sort(arr.begin(), arr.end());

dp[0][0]=0;

for(int i=1; i<=n; i++){
    for(int j=0; j<=k; j++){
        if(i<j) continue;

        ll inc = dp[i-1][j-1];
        ll exc = dp[i-1][j];

        if(inc!=LLONG_MAX) inc+=arr[i-1]*(2*(i-j)-(n-k));
        if(exc!=LLONG_MAX) exc+=arr[i-1]*(2*j-k);

        dp[i][j]=min(inc, exc);
    }
}

return dp[n][k];

}

signed main() { int n, k;

cin>>n>>k;

vector<ll> arr(n);

for (int i = 0; i < n; i++) {
    cin>>arr[i];
}

ll result = fairCut(k, arr);

cout << result << "\n";

return 0;

}