Amy asks Mr. B problem B. Please help Mr. B to solve the following problem. Let p = 1000000007. Given two integers b and c, please find two integers x and y(0≤x≤y
Amy asks Mr. B problem B. Please help Mr. B to solve the following problem. Let p = 1000000007. Given two integers b and c, please find two integers x and y(0≤x≤y
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