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DTBRAK - Day ngoac

Dem so day ngoac do dai n(n <= 10^18) va k ( k <= 50 )

Input

Mot dong la hai so n va k.

Output

In ra dap so.

Example

Input:
1 1

Output:
0

Được gửi lên bởi:Tai Khoan Chung
Ngày:2015-07-22
Thời gian chạy:1s-8s
Giới hạn mã nguồn:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Ngôn ngữ cho phép:C C++ 4.3.2 CPP CPP14

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