Il computer bovino sciocco - Problem

#22575. Il computer bovino sciocco

Statistics

Inesperte di digitale, le mucche volevano una macchina binaria (base2, cowmpouter), ma costruirono base-2! Sono contente perché non ha bit di segno.

Valori da destra:1,-2,4,-8,16,-32, ecc. Contando da1:1,110,111,100,101,11010,11011,11000,11001, ecc. Anche i negativi usano1 e0 senza segno. Scendendo da-1:11,10,1101,1100,1111, ecc.

Converti interi decimali ordinari in base-2.

Input

Un intero in-2,000,000,000..2,000,000,000.

Output

Intero in base-2 senza zeri iniziali.0 va scritto esattamente0.

Esempi

Input 1

-13

Output 1

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