class Solution {
    public int duplicateInArray(int[] nums) {
         int l = nums.length;
        ArrayList<Integer> ints = new ArrayList<>();
        int temp = -1;
        for(int i =0;i<l;i++){
                if(ints.contains(nums[i])){
                    return nums[i];
                }
                ints.add(nums[i]);
        }
        return -1;
    }
}