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Problem 1130. Challenging perms function!

Created by Mehmet OZC

This problem is highly related with Problem 1127.

In oder to encrypt the word 'go' using phone keyboard, we need to do these;

- first find the digits that includes the letters in word. For example letter 'g' takes place on key 4. Letter 'o' is on key 6. So first number is 46.

- create all string permutations using the letters on keys (4 and 6). There are 'ghi' letters on key 4 and 'mno' letters on key 6. All two letter permutation list is {'gm';'gn';'go';'hm';'hn';'ho';'im';'in';'io'}. In this list third one is 'go'. So second number must be 3.

If input is 'go'; output must be [46 3].

What about 'hydroglycerin'? it is 1679616 th word on the permutation list constructed using keys 4937645923746.

If input is 'hydroglycerin'; output must be [4937645923746 1679616].

Given a string, return the keys on phone-keyboard and the order of this string in permutation list!

Problem Group

Solution Statistics

11 correct solutions 4 incorrect solutions
Last solution submitted on May 09, 2014

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