CF784G.BF Calculator

In this problem you will write a simple generator of Brainfuck (https://en.wikipedia.org/wiki/Brainfuck) calculators.

You are given an arithmetic expression consisting of integers from 0 to 255 and addition/subtraction signs between them. Output a Brainfuck program which, when executed, will print the result of evaluating this expression.

We use a fairly standard Brainfuck interpreter for checking the programs:

• 30000 memory cells.
• memory cells store integers from 0 to 255 with unsigned 8-bit wraparound.
• console input (, command) is not supported, but it's not needed for this problem.

本题中，你需要编写一个简单的 Brainfuck（https://en.wikipedia.org/wiki/Brainfuck）计算器生成器。

你将获得一个算术表达式，该表达式由 0 到 255 之间的整数以及其间的加号或减号组成。请输出一个 Brainfuck 程序，该程序在执行时将打印出该表达式的计算结果。

我们使用一个较为标准的 Brainfuck 解释器来验证你的程序：

• 共有 30000 个内存单元；
• 每个内存单元存储 0 到 255 之间的整数，采用无符号 8 位溢出（即模 256 运算）；
• 不支持控制台输入（即 , 命令），但本题中无需使用该功能。

The only line of input data contains the arithmetic expression. The expression will contain between 2 and 10 operands, separated with arithmetic signs plus and/or minus. Each operand will be an integer between 0 and 255, inclusive. The calculations result is guaranteed to be an integer between 0 and 255, inclusive (results of intermediary calculations might be outside of these boundaries).

输入数据仅有一行，包含一个算术表达式。该表达式包含 $2$ 至 $10$ 个操作数，由加号（+）和/或减号（-）分隔。每个操作数均为介于 $0$ 到 $255$（含）之间的整数。计算结果保证为介于 $0$ 到 $255$（含）之间的整数（中间计算结果可能超出此范围）。

Output a Brainfuck program which, when executed, will print the result of evaluating this expression. The program must be at most 5000000 characters long (including the non-command characters), and its execution must be complete in at most 50000000 steps.

输出一个 Brainfuck 程序，该程序在执行时将打印出该表达式的计算结果。该程序长度不得超过 5000000 个字符（包含非指令字符），且其执行步数不得超过 50000000 步。

You can download the source code of the Brainfuck interpreter by the link http://assets.codeforces.com/rounds/784/bf.cpp. We use this code to interpret outputs.

您可以通过链接 http://assets.codeforces.com/rounds/784/bf.cpp 下载 Brainfuck 解释器的源代码。我们使用该代码来解释输出。