The task is to generate the correct answer for a given math problem.

Input: Consider Input: Problem: if there are 200 questions in a 3 hr examination . among these questions are 100 type a problems , which requires twice as much as time be spent than the rest of the type b problems . how many minutes should be spent on type a problems ?

Output: 120 mi


Input: Consider Input: Problem: a is half good a work man as b and together they finish a job in 14 days . in how many days working alone b finish the job ?

Output: 21


Input: Consider Input: Problem: john ' s bank ' s saving amount is decreased 20 % due to loan payment and current balance is rs . 24000 . find the actual balance before deduction ?


Output: 3000