The buildings on the first street are numbered sequentially from 1 to the end of the street, and then continue to be numbered from the building on the opposite street to the opposite of the building numbered 1. Each building is exactly opposite to the building on the opposite side. The building numbered 134 is opposite the building numbered 295, so what is the number of the building that is exactly 1 smaller than the building number opposite.
街道一则的大厦从1开始按顺序编号，直到街尾，然后从对面街上的大厦开始往回继续编号，到编号为1的大厦对面结束，每栋大厦都与对面的大厦恰好相对，若编号为134的大厦在编号为295的大厦对面，那么比对面大厦编号恰好小1的大厦的编号是多少．
<gadget id="calculator">295 - 1</gadget>
<output>294</output>

<gadget id="calculator">134 + 294</gadget>
<output>428</output>

<gadget id="calculator">428 / 2</gadget>
<output>214</output>

<result>214</result>