runtime error: signed integer overflow: 2147483647 + 2147483647 cannot be represented in type 'int' code example
Example: runtime error: signed integer overflow: 964632435 * 10 cannot be represented in type 'int'
while (x != 0) {
int pop = x % 10;
x /= 10;
if (rev > INT_MAX/10 || (rev == INT_MAX / 10 && pop > 7)) return 0;
if (rev < INT_MIN/10 || (rev == INT_MIN / 10 && pop < -8)) return 0;
rev = rev * 10 + pop;
}