/* Write a recursive method that takes as parameters a String s and an integer i and returns a String that has s repeated 2^i times. For example, if the given string is "Go bears! " and the integer is 3 then the return value would be "Go bears! Go bears! Go bears! Go bears! Go bears! Go bears! Go bears! Go bears!". Do not use multiplication or exponentiation in your algorithm. Just double the length of the string i times. */ string repeatPow(string s, unsigned int i);