买彩票保证不赔本的最小花费
2019/03/10
买彩票保证每次买彩票后如果中奖则不赔本的最小花费
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
</body>
<script type="text/javascript">
var countCurrPay = function(n){
var orderCurr = n;//n本次是第几次购买
var SumBefore = 0;//之前总花费
var payCurr = 0;//本次需要花费金额
for (var i = 1; i < orderCurr; i++) {
var sumCurr = SumBefore*2/3;
if(sumCurr==0){
sumCurr = 2;
}
if(Math.ceil(sumCurr)%2==1){
sumCurr = Math.ceil(sumCurr)+1;
}else{
sumCurr = Math.ceil(sumCurr);
}
SumBefore = SumBefore + sumCurr;
}
payCurr = Math.ceil(SumBefore*2/3)
if(payCurr==0){
payCurr = 2;
}
if(Math.ceil(payCurr)%2==1){
payCurr = Math.ceil(payCurr)+1;
}else{
payCurr = Math.ceil(payCurr);
}
return {SumBefore:SumBefore,payCurr:payCurr,allPay:SumBefore+payCurr};
}
console.log(countCurrPay(15))
</script>
</html>每注两元，中奖的话19.4，保本不赔的卖法
var countCurrPay = function (n) {
var orderCurr = n; //n本次是第几次购买
var SumBefore = 0; //之前总花费
var payCurr = 0; //本次需要花费金额
for (var i = 1; i < orderCurr; i++) {
var sumCurr = SumBefore * 2 / 17.4;
if (sumCurr == 0) {
sumCurr = 2;
}
if (Math.ceil(sumCurr) % 2 == 1) {
sumCurr = Math.ceil(sumCurr) + 1;
} else {
sumCurr = Math.ceil(sumCurr);
}
SumBefore = SumBefore + sumCurr;
}
payCurr = Math.ceil(SumBefore * 2 / 17.4)
if (payCurr == 0) {
payCurr = 2;
}
if (Math.ceil(payCurr) % 2 == 1) {
payCurr = Math.ceil(payCurr) + 1;
} else {
payCurr = Math.ceil(payCurr);
}
return {
SumBefore: SumBefore,
payCurr: payCurr,
allPay: SumBefore + payCurr
};
}
console.log(countCurrPay(15))
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