twobuf = new Array(30);
cnt = 0;
C2 = eval(C);
if (C2 < 2) twobuf[0] = C2;
else{
	while(1) {
		twoval = C2 % 2;
		C2 = Math.floor(C2/2);
		
		twobuf[cnt] = twoval;
		cnt++;
		
		if (C2 < 2){
		twobuf[cnt] = C2;
			break;
		}
	}
}

for (i=0; i<=cnt; i++) document.write(twobuf[cnt-i]);