nikitakulikov@MBP-Nikita manual_tests % otool -L a.out       
a.out:
        /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 800.7.0)
        /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1281.0.0)
nikitakulikov@MBP-Nikita manual_tests %

#include <utility>
#include <cstdio>

int main(void){
    int a, b;
    scanf("%i %i", &a, &b);
    std::swap(a, b);
    printf("%i %i\r\n", a, b);
    return 0;
}