block4.java

int findUnique(int[] numbers){
    for(int i = 0; i < numbers.length; i++){
        boolean found = false;
        for(int j = 0; j < numbers.length; j++){
            if(j != i && numbers[i] == numbers[j]){
                found = true;
                break;
            }
        }

        if(!found){
            return numbers[i];
        }
    }
}