Method pop

DesignAStackWithIncrements.java:24–37

()

    }
    
    public int pop() {
        if(isEmpty()){
            return -1;
        }
        int val = stack[index];
        val += operations[index];
        if(index>0){
            operations[index-1] += operations[index];
        }
        operations[index] = 0;
        index--;
        size--;
        return val;
    }
    
    public void increment(int k, int val) {
        if(isEmpty()){