void b_main_sink(unsigned int data);void _main(){unsigned int data;data=0;fscanf (stdin, "%u", &data);b_main_sink(data);}void c_main_sink(unsigned int data);void b_main_sink(unsigned int data){c_main_sink(data);}void d_main_sink(unsigned int data);void c_main_sink(unsigned int data){d_main_sink(data);}void d_main_sink(unsigned int data){{unsigned int result=data * 2;printUnsignedLine(result);}}
static void main(){unsigned int data;data=0;fscanf (stdin, "%u", &data);b_main_sink(data);}void b_main_sink(unsigned int data){c_main_sink(data);}void c_main_sink(unsigned int data){d_main_sink(data);}void d_main_sink(unsigned int data){{unsigned int result=-1;if (data <=(UINT_MAX/2)){result=data * 2;printUnsignedLine(result);}else{printLine("Input value is too large to perform arithmetic safely.");}}}