//m:注数，n:倍数
var getTickets = function(m,n){
var d = [
/*0*/0,
/*1*/1,
/*2*/1,
/*3*/1,
/*4*/2,
/*5*/1,
/*6*/2,
/*7*/2,
/*8*/2,
/*9*/3
];
//得到倍数的种类
var getMultis = function(bs){
var ori = [1,2,3,5,10].reverse();
var multis = [];
var ys = bs;//余数
for(var i = 0;i<ori.length;i++){
if(ys == 0)break;
multis.push(Math.floor(ys / ori[i]));
ys = ys % ori[i];
}
return multis;
};
var multis = getMultis(n);
var all = 0;
for(var i = 0;i<multis.length;i++){
all += Math.ceil(multis[i]*m/5);
}
return all;
};

console.log(getTickets(14,56));