Auto margin for input float left

Question

<div style="width:500px">
<input type="text"><input type="text"><input type="text">
</div>

Inputs have width 31% and i will, that they fill the parent div in 100%. Auto margin for first two inputs. Like this:

Answer 1

Please see below code.

<div class="container">
<input type="text"><input type="text"><input type="text">
</div>

<style type="text/css">
.container {width:500px;}
.container input {width:30%;}
.container input:first-child {margin-right:5%;}
.container input:last-child {margin-left:5%;}
</style>