void b_main_sink(int data);void _main(){int data;data=-1;fscanf (stdin, "%d", &data);b_main_sink(data);}void b_main_sink(int data){{int result=data * 2;printIntLine(result);}}
static void main(){int data;data=-1;fscanf (stdin, "%d", &data);b_main_sink(data);}void b_main_sink(int data){{int result=-1;if (data <=(INT_MAX/2)){result=data * 2;printIntLine(result);}else{printLine("Input value is too large to perform arithmetic safely.");}}}