#include <iostream>
#include <limits.h>
 
template <typename INT> 
INT rol(INT val) {
    return (val << 1) | (val >> (sizeof(INT)*CHAR_BIT-1));
}
 
template <typename INT> 
INT signSafeRol(INT val) {
	typedef typename std::make_unsigned<INT>::type UINT;
    return (INT)(((UINT)val) << 1) | (((UINT)val) >> (sizeof(INT)*CHAR_BIT-1));
}
 
int main() {
	std::cout << rol<std::int32_t>(1 << 31) << "\n";
	std::cout << signSafeRol<std::int32_t>(1 << 31) << "\n";
}

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