@@ -0,0 +1,786 @@
+package org.pilgrim.leetcode.y2021;%0A%0Aimport java.util.HashMap;%0Aimport java.util.Map;%0A%0Apublic class StrobogrammaticNumber %7B%0A    public boolean isStrobogrammatic(String num) %7B%0A        if(num == null %7C%7C num.isEmpty())%7B%0A            return false;%0A        %7D%0A        %0A        Map%3CCharacter, Character%3E map = new HashMap%3C%3E();%0A        map.put('0', '0');%0A        map.put('1', '1');%0A        map.put('6', '9');%0A        map.put('8', '8');%0A        map.put('9', '6');%0A        %0A        %0A        StringBuilder sb = new StringBuilder();%0A        for(int i=num.length()-1; i%3E=0; i--)%7B%0A            if(!map.containsKey(num.charAt(i)))%7B%0A                return false;%0A            %7D%0A            %0A            sb.append(map.get(num.charAt(i)));%0A        %7D%0A        %0A        return num.equals(sb.toString());%0A    %7D%0A%7D

add Strobogrammatic Number