def equalStacks(h1, h2, h3):
    # Write your code here
    sum1=sum(h1)
    sum2=sum(h2)
    sum3=sum(h3)
    if sum1==sum2==sum3:
        return sum1
    else:
        index1,index2,index3=0,0,0
        while not sum1==sum2==sum3:
            if sum1 > sum2 or sum1>sum3:
                sum1-=h1[index1]
                index1+=1
            elif sum2 > sum1 or sum2>sum3:
                sum2-=h2[index2]
                index2+=1
            elif sum3 > sum1 or sum3>sum2:
                sum3-=h3[index3]
                index3+=1
        if index1==len(h1) or index2==len(h2) or index3==len(h3):
            return 0
        else:
            return sum1