先把数字反转，判断是否和原来相等
func isPalindrome(x int) bool {
if x < 0 {
return false
}
//排除以0结尾的情况
if x != 0 && x%10 == 0 {
return false
}
y := 0
c := x
//把x反转，判断是否和原来的x相等
for x != 0 {
y = y*10 + x%10
x /= 10
}
return c == y
}
先把数字反转，判断是否和原来相等
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