Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
********需注意整数溢出********
public int reverse(int x) {
long sum = 0;
while (x != 0) {
sum = sum*10 + x%10;
if (sum>Integer.MAX_VALUE || sum<Integer.MIN_VALUE)
return 0;
x /= 10;
}
return (int)sum;
}
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本文标题：Leetcode-7题:Reverse Integer
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