7. 整数反转

class Solution {
    public int reverse(int x) {
        int pop = 0;
        int result = 0;
        int temp = 0;

        while (x != 0) {
            pop = x % 10;
            temp = result;
            result = result * 10 + pop;

            if ((result - pop) / 10 != temp) {
                return 0;
            }

            x /= 10;
        }

        return result;
    }
}

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