#7 Reverse Integer.java

//https://leetcode.com/problems/reverse-integer/
class Solution {
    public int reverse(int x) {
       int rev = 0;
        while(x!=0)
        {
            int r = x%10;
            x=x/10;
            if(rev> Integer.MAX_VALUE/10 ||rev == Integer.MAX_VALUE/10 && r > 7)
                return 0;
            if(rev< Integer.MIN_VALUE/10 ||rev == Integer.MIN_VALUE/10 && r > 8)
                return 0;
            rev=rev*10+r;
        }
        return rev;
    }
}