insert input fied array in laravel 5.2 - laravel

Question

I want to insert to DB with array input. but have an error. Please help me
this is my code:
in view
Số công văn
<div class="form-group">
<label for="exampleInputpwd1">Người phê duyệt</label>
<div class="input-group">
<div class="input-group-addon"><i class="fa fa-thumbs-o-up"></i></div>
<select class="form-control" name="txtleader[]">
<?php
$list_ld = DB::table('leaders')->select('id','Name')->get();
?>
#foreach($list_ld as $item_ld)
<option value="{!! $item_ld->id !!}">{!! $item_ld->Name !!}</option>
#endforeach
</select>
</div>
</div>
<div class="form-group">
<label for="exampleInputEmail1">Lí do xin vé</label>
<div class="input-group">
<div class="input-group-addon"><i class="icon-question"></i></i></div>
<select class="form-control" name="txtlido[]">
<?php
$list_rs = DB::table('reasons')->select('id','Name')->get();
?>
#foreach($list_rs as $item_rs)
<option value="{!! $item_rs->id !!}">{!! $item_rs->Name !!}</option>
#endforeach
</select>
</div>
</div>
<div class="form-group">
<label for="exampleInputpwd2">Công ty</label>
<div class="input-group">
<div class="input-group-addon"><i class="fa fa-bank"></i></div>
<select class="form-control" name="txtCom[]">
<?php
$list_c = DB::table('companies')->select('id','NameCOM')->get();
?>
#foreach($list_c as $item_c)
<option value="{!! $item_c->id !!}">{!! $item_c->NameCOM !!}</option>
#endforeach
</select>
</div>
</div>
<div class="form-group">
<label for="exampleInputpwd2">Phòng</label>
<div class="input-group">
<div class="input-group-addon"><i class="fa fa-building-o"></i></div>
<select class="form-control" name="txtRoom[]">
<?php
$list_r = DB::table('rooms')->select('id','NameRO')->get();
?>
#foreach($list_r as $item_r)
<option value="{!! $item_r->id !!}">{!! $item_r->NameRO !!}</option>
#endforeach
</select>
</div>
</div>
<div class="form-group">
<label for="exampleInputpwd2">Giao cho</label>
<div class="input-group">
<div class="input-group-addon"><i class="ti-share"></i></div>
<input type="text" class="form-control" id="exampleInputuname" placeholder="Chi nhánh/Đại diện nhận nhiệm vụ" name="txtReceiver[]">
</div>
</div>
<div class="form-group">
<div class="checkbox checkbox-success"></div>
</div>
<div class="text-right"></div>
</div>
<div class="col-md-6">
<div class="form-group nguoixin">
<label for="exampleInputuname">Người xin</label>
<div class="input-group">
<div class="input-group-addon"><i class="icon-user"></i></div>
<input type="text" class="form-control" id="exampleInputuname" placeholder="Người xin" name="txtnguoixin[]">
<input type="text" class="form-control" id="exampleInputuname" placeholder="Người xin" name="txtnguoixin[]">
<div class="input-group-addon"><button class="add-more-nx"><i class="fa fa-plus"></i></button></div>
</div>
</div>
<div class="form-group">
<label for="exampleInputuname">Mối quan hệ</label>
<div class="input-group">
<div class="input-group-addon"><i class="ti-exchange-vertical"></i></div>
<select class="form-control" name="txtRelation[]">
<?php
$list_rl = DB::table('relationship')->select('id','Name')->get();
?>
#foreach($list_rl as $item_rl)
<option value="{!! $item_rl->id !!}">{!! $item_rl->Name !!}</option>
#endforeach
</select>
<div class="input-group-addon"><button><i class="fa fa-plus"></i></button></div>
</div>
</div>
<div class="form-group">
<label for="exampleInputEmail1">Người đi</label>
<div class="input-group">
<div class="input-group-addon"><i class="icon-people"></i></div>
<textarea class="form-control" rows="5" name="txtGuest[]"></textarea>
<div class="input-group-addon"><button><i class="fa fa-plus"></i></button></div>
</div>
</div>
<div class="form-group">
<label for="exampleInputpwd1">chặng bay</label>
<div class="input-group">
<div class="input-group-addon"><i class="fa fa-fighter-jet"></i></div>
<select class="form-control" name="txtFlies[]">
<?php
$list_cb = DB::table('return')->select('id','CodeFN')->get();
?>
#foreach($list_cb as $item_cb)
<option value="{!! $item_cb->id !!}">{!! $item_cb->CodeFN !!}</option>
#endforeach
</select>
<div class="input-group-addon"><button><i class="fa fa-plus"></i></button></div>
</div>
</div>
<div class="form-group">
<label for="exampleInputpwd2">mức giảm</label>
<div class="input-group">
<div class="input-group-addon"><i class="ti-package"></i></div>
<select class="form-control" name="txtDiscount[]">
<?php
$list_dc = DB::table('discounts')->select('id','CodeDist')->get();
?>
#foreach($list_dc as $item_dc)
<option value="{!! $item_dc->id !!}">{!! $item_dc->CodeDist !!}</option>
#endforeach
</select>
<div class="input-group-addon"><button><i class="fa fa-plus"></i></button></div>
</div>
</div>
<div class="form-group">
<div class="checkbox checkbox-success"> </div>
</div>
<div class="text-right">
<button type="submit" class="btn btn-success waves-effect waves-light m-r-10">Thêm mới</button>
</div>
</form>
my controller
$input = Input::all();
$count = count($input['txtnguoixin']);
$ticketin = array();
for($i=1; $i<$count; $i++){
if($input['txtnguoixin'][$i]){
array_push($ticketin, array(
'NoCV' => $input['txtSCV'][$i],
'nguoixin' => $input['txtnguoixin'][$i],
'Com_id' => $input['txtCom'][$i],
'Room_id' => $input['txtRoom'][$i],
'Reason_id' => $input['txtlido'][$i],
'Nguoidi' => $input['txtGuest'][$i],
'Relation_id' => $input['txtRelation'][$i],
'return_id' => $input['txtFlies'][$i],
'discount_id' => $input['txtDiscount'][$i],
'leader_id' => $input['txtleader'][$i],
'nguoinhap' => 'muoi',
'assignto' => $input['txtReceiver'][$i],
'tinhtrang' => 1
));
}
}
echo "<pre>";
print_r($ticketin);
echo "</pre>";
But it has erro undefined offset 1.