[LeetCode] Preimage Size of Factorial Zeroes Function 阶乘零的原像个数函数
Letf(x)bethenumberofzeroesattheendofx!.(Recallthatx!=1*2*3*...*x,andbyconvention,0!=1.)Forexample,f(3)=0because3!=6hasnozeroesattheend,whilef(11)=2because11!=39916800has2zeroesattheend.GivenK,findhowm