LeetCode Weekly Contest 74 793. Preimage Size of Factorial Zeroes Function【二分】
793.PreimageSizeofFactorialZeroesFunctionLetf(x)bethenumberofzeroesattheendofx!.(Recallthatx!=1*2*3*…*x,andbyconvention,0!=1.)Forexample,f(3)=0because3!=6hasnozeroesattheend,whilef(11)=2because11!=399