32 lines
569 B
C
32 lines
569 B
C
#include "lib.h"
|
|
|
|
bool isPalindrome(int x) {
|
|
if (x < 0)
|
|
return false;
|
|
|
|
// Find length and calculate divisor
|
|
int len = 0;
|
|
int div = 1;
|
|
int copy = x;
|
|
while (copy > 0) {
|
|
copy /= 10;
|
|
if (len != 0)
|
|
div *= 10;
|
|
len++;
|
|
}
|
|
|
|
// Compare digits
|
|
for (int i=0; i<len/2; i++) {
|
|
int a = x / div;
|
|
int b = x % 10;
|
|
if (a != b)
|
|
return false;
|
|
|
|
// Remove first and last digit
|
|
x = x % div;
|
|
x /= 10;
|
|
div /= 100;
|
|
}
|
|
|
|
return true;
|
|
}
|