7-line simple accepted Java code,no extra space


  • 0
    D
    # code block
        public boolean isPalindrome(int x) {
            return x >= 0 && x == result(x, 0);
        }
        static int result(int x,int sum){
            if(x==0)return sum;
            return result(x/10,x%10+10*sum);
        }
    

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