166

def ftd(n, d):
        intPart=n/d
        remain=(n%d)*10
        decPart=[ ]
        dix={ }
        i=0
        while True:
            dec=remain/d
            remain=remain%d
            decPart+=dec,
            if remain==0:
                break
            if remain in dix:
                decPart.insert( dix[remain]+1, '(')
                decPart+=')'
                break
            dix[remain]=i
            i+=1
            remain*=10
        return str(intPart)+'.'+''.join(map(str, decPart))