codeforces 675 A~E(Round #353 Div. 2) python and C++ 解法

PROBLEM LIST official tutorial Explanation I use python in Problem A, B & E. while in C and D, I found it easier to write in C++.(for I can use STL to reduce my work)python A题： 题意：给出a，b，c，求是否a加若干个c能获得

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