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Design a one dollar a simple calculator sparse polynomial [basic requirements of] one dollar a simple calculator sparse polynomial basic functions are: (a) input and the establishment of polynomial (2) output polynomial, the output in the form of an integer sequence : n, c1, e1, c2, e2, ... .., cn, en, where n is the number of items polynomial, ci and ei are the first i-item coefficient and index sequence in descending order according to index ( 3) The polynomials a and b are added together, the establishment of polynomial a+ b (4) polynomials a and b-phase reduction, the establishment of polynomial a-b.