There are 50 people in a tour group, and the number of people who have been to attractions No. 1 to No. 9 is 41 to 49 respectively, and the number of people who have visited each attraction is different. Then at least how many people in this tour group have been to the above 9 scenic spots.
某旅游团有50人，其中去过1号景点至9号景点的人数分别是41人至49人，并且到每一景点的人数各不相同．那么此旅游团中至少有多少人以上9个景点都去过．
<gadget id="calculator">50 - 41</gadget>
<output>9</output>

<gadget id="calculator">50 - 42</gadget>
<output>8</output>

<gadget id="calculator">50 - 43</gadget>
<output>7</output>

<gadget id="calculator">50 - 44</gadget>
<output>6</output>

<gadget id="calculator">50 - 45</gadget>
<output>5</output>

<gadget id="calculator">50 - 46</gadget>
<output>4</output>

<gadget id="calculator">50 - 47</gadget>
<output>3</output>

<gadget id="calculator">50 - 48</gadget>
<output>2</output>

<gadget id="calculator">50 - 49</gadget>
<output>1</output>

<gadget id="calculator">9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1</gadget>
<output>45</output>

<result>5</result>