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