单双循环问题的解法

简介：The rain outside the window started to fall, and mist floated on the glass of the display window. The complicated overpass outside was lit up, row by row, like a long fire dragon waking up from its slumber, and thousands of houses were bustling with lights. , people holding umbrellas hurriedly passed by on the overpass, and there was a constant flow of passing vehicles under the bridge.