~{.1&2/}16*;]-1%

for(x=prompt(o='');x;x>>>=1)o=(x&1)+o;alert(o)

o='';i=parseInt(prompt());do{o=(i&1)+o}while(i>>=1)alert(o)

$x=<>;do{@s=($x&1,@s)}while($x>>=1);print@s

$x=<>;do{push@s,$x&1}while($x>>=1);print reverse@s

"01"[1+2|⌊⎕÷2⋆⊖0,⍳15]

"01"[1+2|⌊⎕÷2⋆⊖0,⍳15]
⎕: 0
0000000000000000
      "01"[1+2|⌊⎕÷2⋆⊖0,⍳15]
⎕: 13
0000000000001101
      "01"[1+2|⌊⎕÷2⋆⊖0,⍳15]
⎕: 9999
0010011100001111
      "01"[1+2|⌊⎕÷2⋆⊖0,⍳15]
⎕: -3
1111111111111101
      "01"[1+2|⌊⎕÷2⋆⊖0,⍳15]
⎕: 32767
0111111111111111

x=input();print"".join("01"[x>>i&1]for i in range(15,-1,-1))

char b[17];i=15;main(x){scanf("%d",&x);while(i+1)b[i--]=(x&1)+48,x>>=1;puts(b);}

f(x){(x*=x<0?-printf("-"):1)&&f(x/2);putchar(48+x%2);}

0 * * l B
B * * l C
C * 0 r D
D * * r E
E * * r A
A _ * l 1
A * * r *
1 0 9 l 1
1 1 0 l 2
1 2 1 l 2
1 3 2 l 2
1 4 3 l 2
1 5 4 l 2
1 6 5 l 2
1 7 6 l 2
1 8 7 l 2
1 9 8 l 2
1 _ * r Y
Y * * * X
X * _ r X
X _ _ * halt
2 * * l 2
2 _ _ l 3
3 * 1 r 4
3 1 0 l 3
4 * * r 4
4 _ _ r A

function j(decNumb){var str='';do{str=String(decNumb%2)+str;decNumb=decNumb/2|0;}while(decNumb>=1);return parseInt(str);}

=j(b1)

t:=Number readFrom:Stdin.
((15to:1by:-1)collect:[:i|$0+(t>>i&1)]as:String)print

t:=Number readFrom:Stdin.
15to:1by:-1 do:[:i|($0+(t>>i&1))print]

b=lambda n:n<2 and'01'[n]or b(n//2)+b(n%2);print(b(int(input())))

++++[>++++<-]>>,<[->>++<[->-[>+>>]>[+[-<+>]>+>>]<<<<<]>[-]++++++[->++++++++<]>.[-]>[-<<<+>>>]<<<<]

++[>++++<-]                       preload 8 onto cell 1
>>,<                                input into cell 2
[-                                  iterate over cell 1
    >>++<                               put 2 in cell 3
    [->-[>+>>]>[+[-<+>]>+>>]<<<<<]      division algorithm: converts {n d} into {0 d_minus_n%d n%d n/d}
    >[-]++++++[->++++++++<]>           clears cell 4 and puts 48(ascii of 0) into cell 5
    .[-]                                output n%2 and clear it (the bit)
    >[-<<<+>>>]                         bring n/2 into cell 2 (to be used for division in next iteration)
<<<<]                               end iterate

+>,>-<[>>[->]++[-<+]-<-]++++++++[->++++++<]>+[->+>+>+>+>+>+>+>+<<<<<<<<]>[.>]

(1 bit) +>,>-<[>>[->]++[-<+]-<-]++++++++[->++++++<]>+[->+<]>[.>]
(2 bit) +>,>-<[>>[->]++[-<+]-<-]++++++++[->++++++<]>+[->+>+<<]>[.>]
(3 bit) +>,>-<[>>[->]++[-<+]-<-]++++++++[->++++++<]>+[->+>+>+<<<]>[.>]
etc

f=b+=n/2**e%2*10**e,2**e++/n?f=b:f;echo $[f]

string p(int d){var r="";long i=1;while(r.Length<=64){var g=d&i;r=(g!=0)? "1"+r:"0"+r;i=i<<1;}return r;}

c 0=0
c n=c(div n 2)*10+mod n 2
b('-':r)='-':b r
b r=show.c.read$r