Given a string expression representing an expression of fraction addition and subtraction, return the calculation result in string format.
The final result should be an irreducible fraction. If your final result is an integer, change it to the format of a fraction that has a denominator 1. So in this case, 2 should be converted to 2/1.
\n
Example 1:
\n\n\nInput: expression = "-1/2+1/2"\nOutput: "0/1"\n\n\n
Example 2:
\n\n\nInput: expression = "-1/2+1/2+1/3"\nOutput: "1/3"\n\n\n
Example 3:
\n\n\nInput: expression = "1/3-1/2"\nOutput: "-1/6"\n\n\n
\n
Constraints:
\n\n'0' to '9', '/', '+' and '-'. So does the output.±numerator/denominator. If the first input fraction or the output is positive, then '+' will be omitted.[1, 10]. If the denominator is 1, it means this fraction is actually an integer in a fraction format defined above.[1, 10].给定一个表示分数加减运算的字符串 expression ，你需要返回一个字符串形式的计算结果。
这个结果应该是不可约分的分数，即 最简分数。 如果最终结果是一个整数，例如 2，你需要将它转换成分数形式，其分母为 1。所以在上述例子中, 2 应该被转换为 2/1。
\n\n
示例 1:
\n\n\n输入: expression = \"-1/2+1/2\"\n输出: \"0/1\"\n\n\n示例 2:
\n\n\n输入: expression = \"-1/2+1/2+1/3\"\n输出: \"1/3\"\n\n\n示例 3:
\n\n\n输入: expression = \"1/3-1/2\"\n输出: \"-1/6\"\n\n\n\n\n
提示:
\n\n'0' 到 '9' 的数字，以及 '/', '+' 和 '-'。 ±分子/分母。如果输入的第一个分数或者输出的分数是正数，则 '+' 会被省略掉。[1,10]。 如果分母是 1，意味着这个分数实际上是一个整数。\\u7248\\u672c\\uff1a \\u7f16\\u8bd1\\u65f6\\uff0c\\u5c06\\u4f1a\\u91c7\\u7528 \\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\"],\"java\":[\"Java\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u88ab\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n \\u5305\\u542b Pair \\u7c7b: https:\\/\\/docs.oracle.com\\/javase\\/8\\/javafx\\/api\\/javafx\\/util\\/Pair.html <\\/p>\"],\"python\":[\"Python\",\" \\u7248\\u672c\\uff1a \\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982\\uff1aarray<\\/a>, bisect<\\/a>, 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"book": null,
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"editorType": "CKEDITOR",
"ugcQuestionId": null,
"style": "LEETCODE",
"exampleTestcases": "\"-1/2+1/2\"\n\"-1/2+1/2+1/3\"\n\"1/3-1/2\"",
"__typename": "QuestionNode"
}
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