摘要：A-B ProblemAccept:828Submit:7190Time Limit:1000MSMemory Limit:65536KBDescriptionCalculate A-BInputTwo decimal integers a and b(-10^100 < a,b < 10^100) in one line, separated by one space.OutputOutput a-b in one line.Sample Input1 2Sample Output-1SourceBUPT Online JudgeCODE:importjava.math.BigI 阅读全文