class Solution1 {
/**This is a Java translation, while its Java counterpart could be accepted perfectly, this one failed due to
* Char 21: runtime error: signed integer overflow: 746384741 * 10 cannot be represented in type 'int' (solution.cpp)
*/
public:
bool isPalindrome(int x) {
if (x == 0) {
return true;
} else if (x < 0) {
return false;
}
int tmp = x;
int reverse = 0;
while (tmp != 0) {
reverse *= 10;
reverse += tmp % 10;
tmp /= 10;
}
return reverse == x;
}
};
class Solution2 {
public:
bool isPalindrome(int x) {
if (x < 0 || (x != 0 && x%10 == 0)) {
return false;
}
int sum = 0;
while (x > sum) {
sum = sum*10 + x%10;
x /= 10;
}
return (x == sum) || (x == sum/10);
}
};