jersyguy's blog

By jersyguy, history, 3 days ago, In English

You are given an old touch smartphone numbers having dial pad and calculator app.

Aim: The goal is to type a number on dialpad.

But as phone is old, some of the numbers and some operations can't be touched. For eg. 2,3,5,9 keys are not responding , i.e you cannot use them But you can always make a number using other numbers and operations in Calculator. There could be multiple ways of making a number

.Calculator have 1-9 and +,-,*,/,= as operations. Once you have made the number in Calculator you can copy the number and use it.

You have to find minimum number to touches required to obtain a number.

Input:

There will be multiple Test cases .Each test case will consist of 4 lines 1) First line will consist of N,M,O N: no of keys working in Dialpad (out of 0,1,2,3,4,5,6,7,8,9) M:types of operations supported (+,-,*,/) O: Max no of touches allowed

2) second line of input contains the digits that are working e.g 0,2,3,4,6. 3) Third line contains the valued describing operations, 1(+),2(-),3(*),4(/)

4) fourth line contains the number that we want to make .

Output:

Output contains 1 line printing the number of touches required to make the number

Sample Test Case:

1 // No of test cases 5 3 5 // N ,M, O 1 2 4 6 0 // digits that are working (total number of digits = N), 1 2 3 // describing operations allowed (1--> '+', 2--> '-', 3--> '*' , 4--> '/' )(total number is equals to M) 5 // number we want to make

Answer 3 How 4? 1+4= , "=" is also counted as a touch

2nd Sample Case 3 // No of Test cases 6 4 5 // N ,M, O 1 2 4 6 9 8 // digits that are working (total number of digits = N), 1 2 3 4 // describing operations allowed (1--> +, 2--> -, 3--> , 4-->/) 91 // number we want to make 6 2 4 // 2nd test case 0 1 3 5 7 9 1 2 4 // +, -, / allowed here 28 5 2 10 1 2 6 7 8 2 3 // -, allowed 981

Output:

2 // 91 can be made by directly entering 91 as 1,9 digits are working, so only 2 operations 5// 35-7=, other ways are 1+3*7= 9//62*16-11=

Order for computation will be followed as symbols entered, if + comes, it will be computed first

One more example: lets say 1,4,6,7,8,9 works and +,-,* works. 2,3,5 and / doesn't work. If you have to type 18-> 2 operations. (Each touch is considered an operation),br> If you have to type 5 -> '1+4=' that requires 4 operations. There could be other ways to make '5'.

 
 
 
 
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