#include <stdio.h>
main()
{
	int i,j;

	printf("decimal -> binary\n");
	printf("input decimal number (plus only)=");
	scanf("%d", &i);

	j=2; while(j<=i) j=j+j;

	while(j>0){
		j=j/2;
		if(i>=j){
			printf("1");
			i=i-j;
		}else{
			printf("0");
		}
	}
	printf(" (2)\n");
}