Your task is to implement the function atoi. The function takes a string(str) as argument and converts it to an integer and returns it.
The first line of input contains an integer T denoting the no of test cases . Then T test cases follow. Each test case contains a string str .
For each test case in a new line output will be an integer denoting the converted integer, if the input string is not a numerical string then output will be -1.
1<=length of (s,x)<=10
Example(To be used only for expected output) :
Note:The Input/Ouput format and Example given are used for system's internal purpose, and should be used by a user for Expected Output only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.