Code:

class Solution {
public:
    bool isPalindrome(int x) {
        int out = 0;
        int normal = x;
        while(normal > 0){
            out *= 10;
            out += normal % 10;
            normal /= 10;
        }

        if(out == x){
            return true;
        } else {
            return false;
        } 
    }
};

Error:

Line 7: Char 17: runtime error: signed integer overflow: 998765432 * 10 cannot be represented in type 'int' (solution.cpp) SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior prog_joined.cpp:16:17