<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
</body>
</html>
<script type="text/javascript">
var c = 0
var biao = 0
for(var x = 0;x <=20;x++){
for(var y = 0;y<=50;y++){
for(var z = 0;z<7;z++){
c++;
if(5*x + 2*y + 15*z == 100){
biao++;
}
}
}
}
alert(biao)
</script>