The total length of Xinhua Street is 200m, and 50 red lanterns are decorated on one side of the street, and a "Chinese knot" is hung between every two lanterns. How many "Chinese knots" are there?
新华大街全长200m，在街的一侧装点了50个大红灯笼，每两个灯笼之间又挂了一个"中国结"，"中国结"有多少个．
<gadget id="calculator">50 - 1</gadget>
<output>49</output>

<result>49</result>