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- #include <cstdlib>
- #include <iostream>
- void TryRead(int *x) {
- if (!(std::cin >> *x)) {
- std::cout << "Fail on reading" << std::endl;
- exit(0);
- }
- }
- int main() {
- int a;
- TryRead(&a);
- std::cout << abs(a) << std::endl;
- return 0;
- }
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