負數進制 - Problem

#22816. 負數進制

Statistics

負數進制類似正數進制，但位權每隔一位為負。

七在正二進制為 $111_2$。負二進制的位權使 $7$ 表示為 $11011_{-2}$，因為 $1\cdot16+1\cdot(-8)+0\cdot4+1\cdot(-2)+1=7$。

負數進制不需符號就能表示正、負整數。本題負數進制不使用符號。請將普通整數轉為給定進制。

輸入格式

一行兩整數 $N$ 和 $B$：$-30000\le N\le30000$ 是 $10$ 進制的待轉換數；新進制滿足 $-10\le B\le-2$ 或 $2\le B\le10$。

輸出格式

一行包含 $N$ 的 $B$ 進制表示。

範例

輸入格式 1

7 -2

輸出格式 1

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