My java solution using an array

  • 0
    public boolean isStrobogrammatic(String num) {
        if(num==null||num.length()==0) return true;
        int[] same={0,1,-1,-1,-1,-1,9,-1,8,6};
        for(int i=0; i<=num.length()/2; i++){
            int cur=num.charAt(i)-'0';
            int cur1=num.charAt(num.length()-1-i)-'0';
            if(same[cur]!=cur1) return false;
        return true;

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