{"trustable":false,"prependHtml":"","sections":[{"title":"","value":{"format":"HTML","content":"\u003cdiv\u003e\n\u003cp\u003eMainul has been suffering from calculus lately. He has forgotten the content of his freshman year. Can you help him?\n\u003c/p\u003e\nGiven \u003cimg src\u003d\"https://i.loli.net/2019/09/22/U7GlofNXLV1ahCZ.png\" width\u003d\"100\" height\u003d\"40\"\u003e，\u003cimg src\u003d\"https://i.loli.net/2019/09/22/sucXnAbmK1L4pdB.png\" width\u003d\"100\" height\u003d\"40\"\u003e，find the value of\n\u003cimg src\u003d\"https://i.loli.net/2019/09/22/V7FWlSQwuvineOt.png\" width\u003d\"70\" height\u003d\"40\"\u003e .\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cp\u003eNote that this problem requires multiple sets of data to be read, and each line includes two integers A and B.\u003c/p\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\u003cp\u003eFor each set of data, output the value of \u003cimg src\u003d\"https://i.loli.net/2019/09/22/V7FWlSQwuvineOt.png\" width\u003d\"70\" height\u003d\"40\"\u003eon a separate line. \u003c/p\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"1 2\u003cbr\u003e\n2 3\u003cbr\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"3\u003cbr\u003e\n5\u003cbr\u003e"}},{"title":"Attention","value":{"format":"HTML","content":"The number of rows of input data for this question is indeterminate."}},{"title":"Hint","value":{"format":"HTML","content":"EOF"}}]}