PengsenMao's blog

By PengsenMao, history, 6 years ago, In English

hey guys, i was chatting with my dudes, and then we found an interesting problem, plz give me some ideas, cheers.

give u n numbers represented as ai(can be positive or negative),u have todeal with m operations

  1. add x y c, add c to [x,y]

  2. times x y c, times c to [x,y]

  3. divide x y c, make everything in [x,y] divided by c, ignore the digits after decimal point

  4. ask x y, ask the sum in [x,y]

  5. ask how many times in [x,y] such that the prefix sum of i is negative

n,m smaller than 1e5, other numbers are integers

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