Input text Box Validation inside ng-repeat

Am having a ng-repeat function wherein am displaying 3 input text boxes.But the sane button dosen't seem to apply validations(I need to enable 'Save' button only if I fill all the three inputs)

<form name="myForm" novalidate>
    <div ng-repeat="item in items">
    <input type="text" ng-model=item.name required class="form-control">
    </div>
</form>
<button type="button"  ng-disabled="myForm.$invalid" ng-click="save()">Save</button>

Controller:

$scope.items=[{
                id:1,
                name:VALUE1
              },{
                id:2,
                name:VALUE2
              },{
                id:3,
                name:VALUE3
            }]