Removes Extra zeroes from front of a string .
static String removeLeadingZeores ( String s ) { int n = s . Length ; int i = 0 ; while ( i < n && s [ i ] == '0' ) i ++ ; if ( i == n ) return "0" ; String temp = " " ; while ( i < n ) { temp += s [ i ] ; i ++ ; } return temp ; } static bool isPower ( String s1 , String s2 ) {