<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<style>
body{
display: flex;
flex-direction: column;
height: 100vh;
margin: 0;
}
#con{
display: flex;
height: 400px;
background: green;
align-items: center;
flex: 1;
}
div{
background: blue;
height: 200px;
align-self: auto
}
.middle{
background: yellow;
flex: 1;
}
.left{
order: -1;
flex: 0 0 200px
}
.right{
flex: 0 0 220px
}
</style>
<body>
<div id="con">
<div class="middle">222222222222</div>
<div class="left">1111111111</div>
<div class="right">333333333333</div>
</div>
</body>
</html>
