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Keypad typing

Tags : string, geeksforgeeks, cpp, easy

Problem Statement - link #

You are given a string S of alphabet characters and the task is to find its matching decimal representation as on the shown keypad. Output the decimal representation corresponding to the string. For ex: if you are given “amazon” then its corresponding decimal representation will be 262966.

Your Task: Complete printNumber() function that takes string s and its length as parameters and returns the corresponding decimal representation of the given string as a string type. The printing is done by the driver code.

Expected Time Complexity: O(N)
Expected Auxiliary Space: O(N)

Examples #

Example 1:

Input:
S = geeksforgeeks
Output: 4335736743357
Explanation:geeksforgeeks is 4335736743357
in decimal when we type it using the given
keypad.

Example 2:

Input:
S = geeksquiz
Output: 433577849
Explanation: geeksquiz is 433577849 in
decimal when we type it using the given
keypad.

Constraints #

Solutions #

class Solution{
    public:
    //Function to find matching decimal representation of a string as on the keypad.
    string printNumber(string s, int n) 
    {
        //code here
        string no = "22233344455566677778889999";
        string res = "";
        for(char c: s)
            res += no[c-'a'];
        return res;
    }
};