B'Little girl Tanya climbs the stairs inside a multi-storey building. Every time Tanya climbs a stairway, she starts counting steps from 1 to the number of steps in this stairway. She speaks every number aloud. For example, if she climbs two stairways, the first of which contains 3 steps, and the second contains 4 steps, she will pronounce the numbers 1, 2, 3, 1, 2, 3, 4 . You are given all the numbers pronounced by Tanya. How many stairways did she climb? Also, output the number of steps in each stairway. The given sequence will be a valid sequence that Tanya could have pronounced when climbing one or more stairways. The first line contains n ( 1 <= n <= 1000 ) -- the total number of numbers pronounced by Tanya. The second line contains integers a_1, a_2, ... , a_n ( 1 <= a_i <= 1000 ) -- all the numbers Tanya pronounced while climbing the stairs, in order from the first to the last pronounced number. Passing a stairway with x steps, she will pronounce the numbers 1, 2, ... , x in that order. The given sequence will be a valid sequence that Tanya could have pronounced when climbing one or more stairways. In the first line, output t -- the number of stairways that Tanya climbed. In the second line, output t numbers -- the number of steps in each stairway she climbed. Write the numbers in the correct order of passage of the stairways. '...