#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char const *argv[])
{
	if (strcmp(argv[2], "cm") == 0){
		double val =strtod(argv[1], NULL);
		val = val / 2.54;
		printf("%.2lf%s", val,"in");

	}
	if (strcmp(argv[2], "in") == 0){
		double val = strtod(argv[1], NULL);
		val = val*2.54;
		printf("%.2lf%s",val,"cm");
	}
	return EXIT_SUCCESS;
}