Preparing NOJ

Consider the histogram composed of $$$n$$$ squares with side lengths $$$a_1, a_2, \cdots, a_n$$$. Let's call the sequence $$$(a_1, a_2, \cdots, a_n)$$$ the histogram sequence of this histogram.

Let's consider the height of each column in this histogram. The first $$$a_1$$$ columns will each have height $$$a_1$$$, the following $$$a_2$$$ columns will each have height $$$a_2$$$, ... and the last $$$a_n$$$ columns will each have height $$$a_n$$$. Now, let us define the height sequence $$$(b_1, b_2, \cdots, b_{a_1 + a_2 + \cdots + a_n})$$$ where $$$b_j\ (1 \le j \le a_1+a_2+\cdots+a_n)$$$ is the height of the $$$j$$$-th column.

For example, the histogram with $$$(3, 2, 1, 4)$$$ as its histogram sequence has $$$(3, 3, 3, 2, 2, 1, 4, 4, 4, 4)$$$ as its height sequence.

Write a program to find the histogram sequence given the height sequence.

The first line contains a single integer $$$m\ (1 \le m \le 10^6)$$$ representing the length of the height sequence $$$\{b_i\}$$$ is given.

The second line of the input contains $$$m$$$ integers, the height sequence. Specifically, the $$$i$$$-th integer in the line is $$$b_i\ (1 \le b_i \le m)$$$.

The input is designed such that the provided height sequence corresponds to a valid histogram sequence.

Output $$$n$$$ integers on a single line, $$$a_1, a_2, \cdots, a_n$$$ where $$$(a_1, a_2, \cdots, a_n)$$$ is the histogram sequence corresponding to the given height sequence. If there are multiple answers, any one of them will be accepted.

10 3 3 3 2 2 1 4 4 4 4

3 2 1 4

5 2 2 2 2 1

2 2 1

Info

Provider CodeForces Gym

Origin XXII Open Cup. Grand Prix of Korea (Division 2)

Code GYM103372A

Tags

Submitted 2

Passed 0

AC Rate 0%

Date 10/31/2021 14:45:33

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