Compute a Salary Threshold

public class Solution {
    public int capSalary(int[] salaries, int payroll) {
        if (salaries == null || salaries.length == 0) {
            return 0;
        }

        if (salaries.length == 1) {
            return payroll;
        }

        Arrays.sort(salaries);
        int n = salaries.length;
        int remainder = payroll;
        for (int i = 0; i < n; i++) {
            int cap = remainder/(n-i);
            if (cap <= salaries[i]) {
                return cap;
            }
            remainder -= salaries[i];
        }

        return payroll/n;
    }
}